Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4985b996d47268…

MALICIOUS

PDF

40.3 KB Created: 2020-08-14 11:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8a74ac1e87934a82a14f1e487b599b0 SHA-1: d912b4b5401e05cfa18b8a7c25d30285c0ea068a SHA-256: 7c4985b996d47268ef93c528fc966f63b1e3c06b5f57d663333a21516ee056da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The embedded URLs, particularly the one pointing to 'ttraff.com', are flagged as malicious redirectors. The document body, though heavily obfuscated, contains references to these URLs, reinforcing the lure of a free download. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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/wb?keyword=sistem%20pendidikan%20vernakular%20pdf In PDF document text
    • http://zabit.darlenetsao.com/uploads/1/3/1/4/131483492/38d457888.pdfIn PDF document text
    • http://files.exsanguinationsignet.com/uploads/1/3/2/7/132712483/bogululuvaxafogime.pdfIn PDF document text
    • http://paziwen.hermosawebdesign.com/uploads/1/3/0/7/130776078/gopibinoberariba.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/1/0440/1650/0886/files/gezimizosijukomuvin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/luxedamobovumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/70778597223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vinupagudesezubinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8485/8022/files/rodexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4209/4756/files/xaxasuvatosowowot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3623/5160/files/developing_skills_for_the_toefl_ibt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/68854404465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/39764440216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/kartilya_of_the_katipunan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/asterisk_voip_manual.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 6

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_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 5416 bytes
SHA-256: cbe28716fb272c1410fbb02a3620a44d6879002ed3adb39031731dad55560c39
font_01_sfnt_off00007341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7341 9716 bytes
SHA-256: 7bf42360936bc4391bab3d66bd476efc1974bab56fdb8d384268080670061a23

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