Malicious PDF — malware analysis report

Static analysis result for SHA-256 737cbc6bff21c760…

MALICIOUS

PDF

48.9 KB Created: 2020-08-23 06:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed55640d77dc401ca1759f2754a1a420 SHA-1: 38fda8d471bb82dfceff2cea183465e9f290e162 SHA-256: 737cbc6bff21c7608144691b6201d0c27a94d1122f542ef9b367c9968388b5f1
234 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. A primary link redirects through 'ttraff.cc', a known malicious redirector, with a keyword suggesting a phishing lure for Gmail account recovery. The presence of a password-protected archive lure heuristic further suggests this document is designed to trick users into downloading and decrypting a malicious payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=gmail+account+password+recovery+software+free In PDF document text
    • http://files.positiveposturenz.com/uploads/1/3/1/4/131483550/sivaf_polatafi_zuwovil.pdfIn PDF document text
    • http://xapim.vickiegeorge.com/uploads/1/3/0/7/130776031/3773544.pdfIn PDF document text
    • http://files.counsellinggoldcoast.com.au/uploads/1/3/1/0/131069812/dinebinasunobonozu.pdfIn PDF document text
    • http://files.offmyeasel.com/uploads/1/3/0/9/130969754/9123925.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/1/0428/0070/9791/files/75275863290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/57753049660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/four_syllable_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2585/9495/files/android_studio_show_toast_message.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9114/7417/files/bowanojareref.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/best_fast_android_emulator_for_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/panurokizewatux.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 8

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_off00007877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7877 5588 bytes
SHA-256: 7b91ff4f25da7f22506f1411ba6e5181afa3d98bbbda2bb95914d99859d8012e
font_01_sfnt_off00008b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B77 13620 bytes
SHA-256: fbc30778d74c2a75a770cf54791b362b1fafeec94cd72194ae0946758b246b19

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