Malicious PDF — malware analysis report

Static analysis result for SHA-256 6838ac9482b7f5f8…

MALICIOUS

PDF

75.2 KB Created: 2020-08-08 23:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76445db256dbe018f8c53e342dc9234b SHA-1: 21784979be3afbb52ca959e3569993bf6e2b9070 SHA-256: 6838ac9482b7f5f8b40485d9301a28e50fbd8f3e385f9cc0107b111f42978779
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirectors. The primary redirector URL, 'https://ttraff.com/pify?keyword=accounting+journal+entry+practice+test+pdf', is flagged as malicious and indicative of a phishing or scam lure. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination for users. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.com/pify?keyword=accounting+journal+entry+practice+test+pdf In PDF document text
    • http://files.yaginoodles.com/uploads/1/3/1/0/131070539/8994577.pdfIn PDF document text
    • http://files.martigraceashby.com/uploads/1/3/0/8/130874610/nejulomimur.pdfIn PDF document text
    • http://files.bridgewatercare.org.uk/uploads/1/3/1/4/131407552/95b9cff.pdfIn PDF document text
    • http://lopugux.inspiredayurveda.com/uploads/1/3/1/6/131606407/6802873.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/1/0432/8616/7702/files/berujoxofeseva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/40367217858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/54410647445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/42211651945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8950/7990/files/architectural_perspective_drawing_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/subatepukaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0958/8897/files/mukifufix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9495/7470/files/selogowaxefexawasinarojul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/45303913324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pidepuwavulosetanujerepub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/setupejumozoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3071/6326/files/19288308616.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 5488 bytes
SHA-256: a6925b3a8fbd7e76168075242ca6369ddd969ddde097a1eed99dc8356decc857
font_01_sfnt_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 11032 bytes
SHA-256: b90a3f0bedbef480cffc3e9f80483a4d692396a402b24d83e28b51b61ab78e0c