Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c12b9240fcc1e87…

MALICIOUS

PDF

40.7 KB Created: 2020-07-31 05:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f91b324b1aadedc71aae65444b3e1f1 SHA-1: aae23889ad1e462e618d89a3f3018dca9821d782 SHA-256: 1c12b9240fcc1e8729db39c2da163d8cb83429e9a0ddadac514c3f05bc4d0a5a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document appears to be part of an SEO link farm, likely designed to lure users to malicious content or phishing sites. The ML classifier strongly indicated 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.ru/pify?keyword=slavery+in+africa+historical+and+anthropological+perspectives+pdf In PDF document text
    • http://files.gemgrooming.com/uploads/1/3/0/7/130775758/tazajizavavaf_xejewoxuvemer.pdfIn PDF document text
    • http://files.tasteofmansfieldct.org/uploads/1/3/1/6/131636972/nuzupijaw-ponajokerogut.pdfIn PDF document text
    • http://files.joycerandall.com/uploads/1/3/0/7/130740222/2113146.pdfIn PDF document text
    • http://files.pburg94rescue.org/uploads/1/3/1/0/131070688/walativab-rizejojeb.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/1/0430/1769/9477/files/xaxoterisozojewukiletaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/topebivizosugagared.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/kogeviked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/29516251894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/87427307510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/lejafif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/85009454253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/fotutukowonud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/48135610594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/tozegasijiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8271/9127/files/vetebajowowojoj.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_off00005e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5472 bytes
SHA-256: 34271f9728c9ef94c15df9f10b19ae11bd2fb805a57c7813ffc918a08d156a2c
font_01_sfnt_off0000710d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 10640 bytes
SHA-256: 7c5b52c49578bd62ccede4e42a0859301bf51c71da60e1ad9842bd43c16b4817

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