Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8133ae6ec79392…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 05:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a69c1cc4ed0a01a7f38f19717a211135 SHA-1: 5a2e2ba650c7440e27bddcb8d3dfba1bf0a1df7e SHA-256: ab8133ae6ec793920294b0934209bcc5ac5a48f6a2298beb580999346ab1f8d0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a link farm strategy, likely to distribute malicious content or phish users. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=pdf+file+resize+1+mb In PDF document text
    • http://files.abbi.ca/uploads/1/3/2/6/132681796/vevefakak.pdfIn PDF document text
    • http://files.llaycommunitychurch.com/uploads/1/3/2/7/132712088/724f57967bfe2c.pdfIn PDF document text
    • http://files.match-gems.com/uploads/1/3/2/7/132740598/913690.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/1/0428/2109/1484/files/telazireke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/32632539359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/5020582729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/wazunesigarubesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/fitipaxumusabiwutebetov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/55432655179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/estadistica_descriptiva_spss.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/5755377164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/fuwovutof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/pefekejedegimisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/massimo_cacciari_libri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/29351566498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/dalapikitojiguwatin.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_off000069f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F6 5084 bytes
SHA-256: 5a01d0c087abf50bdc945b8e5a720b5193473cfc7646355b2df2f8fa7d4b8bea
font_01_sfnt_off00007b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B38 10616 bytes
SHA-256: a024b1ca5ef8374772359cd02449eb7881171113eb01f61cffd2b2a882e1f0d2

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