Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b7cab6d0388fac…

MALICIOUS

PDF

43.8 KB Created: 2020-08-03 18:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc271e55fc2747699839646207d5d157 SHA-1: a108babaf9571f2e1a5d273d3e67ee64abb8f515 SHA-256: 87b7cab6d0388facad00d5fe8360bd5a9013ebe970d7f3464ca2e940c98a8ad3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body and embedded links suggest a lure to download a PDF, likely a phishing or scam attempt. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=guitar+chords+christian+songs+pdf In PDF document text
    • http://files.thevictualbar.com/uploads/1/3/1/4/131438038/nekomopu.pdfIn PDF document text
    • http://files.bazowska.com/uploads/1/3/1/4/131455158/zorepobaw.pdfIn PDF document text
    • http://files.perspectate.com/uploads/1/3/1/3/131384171/ruwabupojazewu-zaxemazus-zutoxin-vemutiwevabuxu.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/1/0427/9681/0396/files/93916486089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/vokizowupewevurelaresuzom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4007/2102/files/gejoveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3403/9704/files/76605257943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/aqualung_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/gugisezurimanavulodozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/85120908582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/banan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/79320350382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/53438627534.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 7

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_off00006ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CED 5416 bytes
SHA-256: 7c6130846b3331b58de256798099cb12c64ade279cbf822d78f88c7b52ce81a6
font_01_sfnt_off00007f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F56 10120 bytes
SHA-256: 37139ac4a26c75dd52dfe527d9d954d9d4fa10072d8ba2e5554f219f0e6153a6

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