Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a769a85299b622e…

MALICIOUS

PDF

49.7 KB Created: 2020-08-04 16:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c70b167b129574784cdc51dfbdad7482 SHA-1: ff8bd1decd3a9bb71c7f35a26d9e4b996c9ddad9 SHA-256: 8a769a85299b622ebdf39e8255ea8851a1d722abf10eac1bb9d7afe1826f06fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an approval request letter. The document also hosts a large number of external PDF links, many hosted on Shopify, likely as part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=approval+request+letter+pdf In PDF document text
    • http://files.natalieberry.net/uploads/1/3/1/8/131872137/sipuxogivasiwinegog.pdfIn PDF document text
    • http://files.psumocktrial.org/uploads/1/3/2/7/132740408/joforubejetolo-falikad-gefogizi-lumomojof.pdfIn PDF document text
    • http://files.koreasda.com/uploads/1/3/1/1/131163898/7197526.pdfIn PDF document text
    • http://files.xoxoperformance.org/uploads/1/3/0/7/130775257/zirapaxapimu.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/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9586/6010/files/dosevekesetupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/vafawubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/77078622219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3246/8904/files/jawutifojizen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/davids_bridal_sales_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/28942888883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/2_legit_2_quit_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/35491139321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/feroroloxuxipanawewoboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/99837624709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/nirowazuvuleje.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

Related samples 6

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8448 5208 bytes
SHA-256: 56d73a5a9a95e6ecd265bd3a75da5d916d6e287c71ca9b912bd98a16ec06c14a
font_01_sfnt_off00009610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9610 10524 bytes
SHA-256: 9bdfa833d7f8c54ab9c8c29043c92300764994c6f1b287df5a0ce20ce09d1bc6

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