Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae826960ca51b5d4…

MALICIOUS

PDF

53.6 KB Created: 2020-08-09 18:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 967983e8c3f9a05df730599aacc42160 SHA-1: 7e45f3bd6bcc790bb077d68eb6f44acf75fa0b80 SHA-256: ae826960ca51b5d46c31c82857faba6e6dff1c8d6b2ed2b7576a2f64c3fecf01
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Cancer de pr ostata pdf 2020' and mentions 'wkhtmltopdf', suggesting a lure for search engine optimization to distribute malicious content. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=cancer+de+pr%25C3%25B3stata+pdf+2020 In PDF document text
    • http://files.rooflesspainters.com/uploads/1/3/1/4/131407665/noketuvuxudikijigu.pdfIn PDF document text
    • http://files.neisdoap.net/uploads/1/3/1/4/131407818/raxerija-bujozafajobil-ruvebi.pdfIn PDF document text
    • http://gedoneku.iamlovedministry.com/uploads/1/3/1/8/131872055/ff7647a7a13f6.pdfIn PDF document text
    • http://files.3mbc.org/uploads/1/3/1/3/131382491/2938198.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2387/5746/files/cambridge_primary_english_phonics_workbook_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/difetilijixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/66966967780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/4523728455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/fajexewexujitosivejigosab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/xosopomefimawipepabuwixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9767/files/80962525530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/artificial_intelligence_full_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/fexisuwiweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/nojegajaputiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/wamijorubososedip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/pasej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/iam_751_boeing_contract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/powerex_mh-_c9000.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D0 5180 bytes
SHA-256: c4689cd2c0d732e3074d6571c9c09ee05ba70d1365d47a9afc553263499264ba
font_01_sfnt_off00009375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9375 11676 bytes
SHA-256: d5da1a30fdf9345a1dd4ebd400c549abc9915ad3250a65f0eff8a4f37749fd81
font_02_sfnt_off0000b96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB96E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f