Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71754331cc935f6…

MALICIOUS

PDF

44.5 KB Created: 2020-07-30 08:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf025a1f2dabc71a1a9adb2bdc63bc79 SHA-1: ad99e542ae12fc1644fbdc32511dd74396af4c03 SHA-256: b71754331cc935f6b099e044d9f4f5ecf05ebcaf2b439ace07c94897398f828f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Another critical heuristic indicates a link farm, suggesting an attempt to distribute malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains text related to a textbook, likely used as a pretext for the malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=class+10+english+language+and+literature+textbook+pdf In PDF document text
    • http://files.markspencercook.com/uploads/1/3/1/6/131606125/bowikedelijiban.pdfIn PDF document text
    • http://files.rusticmtnart.com/uploads/1/3/1/3/131380875/teteruguxasa.pdfIn PDF document text
    • http://files.cisairandheat.com/uploads/1/3/1/8/131871593/1008738.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/1/0434/1858/3192/files/47918888835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/difukemajakiwito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/ralapowejitunefewowefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/92665151127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0679/3627/files/7087327624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/kuzokalabogolibekok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/sugasokegagama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/80564087387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/88301624356.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 5

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_off00006fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC9 5672 bytes
SHA-256: 18bb4c0c407f56da4b2c378eed22f8bd5e92d0f713c8435c263c3f3730e2f55f
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 9976 bytes
SHA-256: 17593d777a6e60e94ae33fb3acc52be757bb31ca8ab3814705ec38ba11d23d97

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