Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b51f181effae267…

MALICIOUS

PDF

35.6 KB Created: 2020-08-13 03:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b2595c3453a4d0b3b9a688b22bf772f SHA-1: 59a5b52e6f4ceaff079274dc5270ba79035e843d SHA-256: 7b51f181effae26763607de5d2bb4b8d69880ebf52164fd048f859ec326d24c0
214 Risk Score

Malware Insights

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

The PDF contains a link to a malicious redirector, ttraff.cc, which is part of a link farm designed to lure users into downloading PDFs. The redirector ultimately points to a Shopify domain hosting the purported PDF. The ML classifier also strongly indicated maliciousness, and the document body contains obfuscated text and a URL that aligns with the SEO link farm heuristic.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=forensic+anthropology+current+methods+and+practice+pdf+download In PDF document text
    • http://files.soulastro.com/uploads/1/3/1/6/131606901/6276169.pdfIn PDF document text
    • http://vuladerid.seahavenhold.com/uploads/1/3/1/1/131164312/vozojodopaxevix_rirudebabo_xufiguj.pdfIn PDF document text
    • http://files.operabarcarola.com/uploads/1/3/0/9/130970015/c6df91adc912.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/1/0431/0918/7750/files/28021912896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/8885948919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/45_55_reddit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3549/0461/files/xasufasogubikowovibipas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6080/4249/files/54883900011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/76094536524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5242/files/xazarovuterodivalerid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/jijuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/xotus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0667/1517/files/61432004922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/contacto_carl_sagan_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/autocad_2015_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/bitaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/33268920482.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_off00004bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF0 5716 bytes
SHA-256: 590e76a952a874ebc16b31d163a3e3721d50acdef1df6592c3c6712f633a6d34
font_01_sfnt_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 9888 bytes
SHA-256: 8d690b72f2327622cb9ac50c7cc4b3de7e412a0788aac55090d198d7fb2f0c7a