Malicious PDF — malware analysis report

Static analysis result for SHA-256 761a0fa30cbbe3f8…

MALICIOUS

PDF

66.5 KB Created: 2020-07-21 14:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8803c8196cfbfa74b25172056e0c011 SHA-1: 7ed432496c0fdea9f8581f294505c11fd59bf4e3 SHA-256: 761a0fa30cbbe3f8828b96951233799d1b6756a2ef1b7b7dd0a5198c18ed1312
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. This suggests a phishing or malware distribution attempt, likely using a lure related to 'dart language flutter pdf' as indicated in the URL. The presence of a large number of PDF links also indicates a link farm strategy. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=dart+language+flutter+pdf In PDF document text
    • http://files.friendscarvingclub.org/uploads/1/3/1/4/131438441/6743243.pdfIn PDF document text
    • http://files.andreacoppini.com/uploads/1/3/2/6/132682640/1fa32f0.pdfIn PDF document text
    • http://files.foresightencyclopedia.com/uploads/1/3/1/4/131437504/pexefukigazidiwoj.pdfIn PDF document text
    • http://files.joanna-and-jonathan.com/uploads/1/3/2/7/132740553/xeluzoso_fekiwexaj.pdfIn PDF document text
    • http://files.colandrcommunity.com/uploads/1/3/2/3/132302859/pijegadunefixulumol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0954/6136/files/pitavolamukerere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/31078288196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/18300748584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7192/2591/files/zifeporujodixuzizelupixef.pdfIn PDF document text
    • https://zarozevebe.files.wordpress.com/2020/06/pumolofumexuzagukepoz.pdfIn PDF document text
    • https://bibewawaluso471746960.files.wordpress.com/2020/07/42316369518.pdfIn PDF document text
    • https://kovelika628460905.files.wordpress.com/2020/07/84442034199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nefodegaxinavikiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2616/9503/files/91965803857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/41927228069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0351/6827/files/87222275781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/86369147856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/fivilikakixuwozinofenike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/24855372574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/jedikafozotit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/57959277933.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B83 4756 bytes
SHA-256: ef0223f1fed40ad82f60aef4da7bb9b3805ad2ceb9e3b54dc23e5c270d1f8705
font_01_sfnt_off0000abb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB6 2268 bytes
SHA-256: 87560c96094722e0b06e960fc6e6e0982e5dd9a45b3b8c8ce6a725bc3f373f32
font_02_sfnt_off0000b5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 15136 bytes
SHA-256: 360733cded63d00461149dc1dcd88317e27b209e307a9c1216f397ad826e7f6a
font_03_sfnt_off0000e5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 16312 bytes
SHA-256: 0e5b79f390bc9065d5ea5cf6fe93fcfbeeb2c3a25070c4fed8fd53e6e5f2ed0c

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