Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1581bc8f688c2b…

MALICIOUS

PDF

42.2 KB Created: 2020-07-30 19:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f846aa38448ce61a6997ea3e7692d1fe SHA-1: 4c9de49bf98bbe9e89f78217913a5ae68e3b4b6f SHA-256: 0c1581bc8f688c2b8740010978b5f56659569f725dcc0af80f55f91af5fefb30
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, appears to be a lure for a technical document. The presence of many SEO-optimized PDF links suggests a link farm or phishing campaign aiming to drive traffic to malicious sites.

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=z80+assembly+language+programming+leventhal+pdf In PDF document text
    • http://files.katsparklez.com/uploads/1/3/0/9/130969966/e7b61e58926.pdfIn PDF document text
    • http://files.alexandriatalley.com/uploads/1/3/2/6/132695301/pejibow-tiwunimikerizen-pugolokebagor.pdfIn PDF document text
    • http://files.fiveopen.com/uploads/1/3/1/6/131607023/4042136.pdfIn PDF document text
    • http://files.storiadeldiritto.org/uploads/1/3/1/6/131637484/e16267ff26.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/1/0432/5654/5433/files/vofeboxujanegaseforax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/soxos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/jofimudivijojexepud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0849/8591/files/82342288302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/joxedadugesode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/pibik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6569/4613/files/jipunuxederojusubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27360052690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/50567883553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/47267851447.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_off000064e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 5932 bytes
SHA-256: 1d81011a5d66cb9b216e91466fa217b5b5fd8f7e9309ce7fd4816541032bf0a1
font_01_sfnt_off000078e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E5 9976 bytes
SHA-256: d9eef4b514f04aeaa934eba6cc81a8c86472c15518dfd8b3ae538f9af112c7c6

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