Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3617f73bb67e1b…

MALICIOUS

PDF

60.6 KB Created: 2020-08-15 02:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 881454b37958b758c845ed46808a28ae SHA-1: 779c5fc0169d1c0caff89f51614ee3af74dc6710 SHA-256: 7f3617f73bb67e1b6d73cb09668e02cc5ecabb3bacb039ed4cb2b13a9caa0b01
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a link impersonating Facebook, directing users to a redirector URL that is part of a known link farm. This lure is designed to trick users into downloading a PDF, likely for credential phishing. The ML classifier strongly indicated maliciousness, and the heuristics point to a brand-impersonation phishing attempt.

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.cc/pify?keyword=facebook+ads+manager+guide+pdf.
  • 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=facebook+ads+manager+guide+pdf In PDF document text
    • http://files.palermiscollection.com/uploads/1/3/2/6/132681378/fuxubidatesivi-tewojugedodajer.pdfIn PDF document text
    • http://nusogebo.thehistoricallouezsociety.org/uploads/1/3/0/8/130814729/1076252.pdfIn PDF document text
    • http://files.k9ssolutions.com/uploads/1/3/2/6/132682745/gogoza.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/1/0432/6624/4766/files/monitronics_alarm_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/gezebirofolumifovotujopef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/lenuworexofizujeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/21249947549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/namakam_chamakam_in_kannada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/64599918950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/logical_fallacies_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/auriol_std_black_font_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51106899687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/12649901586.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BC 5600 bytes
SHA-256: 94598214f6c7721d1e9124fb231fc570d24dd7673c50092b16da7c021315d3ac
font_01_sfnt_off0000aba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA8 10616 bytes
SHA-256: fc5be0048dc6ed36f00e3fcd4f9884b5e737d426120b88d9a5cbac4e42d64737
font_02_sfnt_off0000cff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF1 16348 bytes
SHA-256: 52f9cc2ba8b6a7631d3be955e05ffd4eef8a1a88483b81054cf77f6ae8c2f0f0