Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a1df0dcccfbf2b…

MALICIOUS

PDF

38.7 KB Created: 2020-08-13 05:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bf6719eb5b5ce263951400ddc4ce221 SHA-1: cb49a51e372784152368259ae545b9a59ed91eb9 SHA-256: 12a1df0dcccfbf2be1c62a681375b6f7c8a53bc964dfb1eb5496241f80135dd9
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 infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to redirect users to potentially harmful content, likely for phishing or malware delivery.

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=j%25C4%2599zyk+angielski+s%25C5%2582ownictwo+tematyczny+zbi%25C3%25B3r+%25C4%2587wicze%25C5%2584+pdf In PDF document text
    • http://zapizejop.mathiasscarborough.com/uploads/1/3/2/6/132695829/zajefilo.pdfIn PDF document text
    • http://zuwapo.resilienttruths.org/uploads/1/3/1/4/131408999/baralob-xigazabe-dipipil.pdfIn PDF document text
    • http://files.jassiewassy.com/uploads/1/3/1/6/131606260/c0c36ad.pdfIn PDF document text
    • http://files.evansadopt.com/uploads/1/3/1/4/131408439/793d9be0.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/1/0434/1222/6206/files/3gp_to_mp3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/kinuxorelabixen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0405/8010/files/online_document_converter_to_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/los_tres_mosqueteros_alejandro_dumas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/49733153734.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/briggs_and_stratton_model_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/16880853996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/genetica_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4284/8418/files/jumuganolasafega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/wugexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/gavoliziwuzexoluxawav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/14102136302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1177/6416/files/16876974159.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_off000050c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C9 6552 bytes
SHA-256: 656071aad3a9f11a050ecce3917849482565a8d14b60f4fc5cdab2d8f42509ea
font_01_sfnt_off0000660e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660E 11944 bytes
SHA-256: 9e9366452491c9f0f5583a13d7c5feb0022113fdd59ffbf3e03aeab48d76c902

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