Malicious PDF — malware analysis report

Static analysis result for SHA-256 852abacf25475f58…

MALICIOUS

PDF

34.3 KB Created: 2020-08-07 22:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5090974c169ec03976d9507700248a19 SHA-1: 4fc0c877f0cbb4e1a282c30926ae3e87175d049a SHA-256: 852abacf25475f581b120fde697180f648a3f3d8cf5296301034ebb16a2a5ebd
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a primary link pointing to a redirector that masquerades as a free download for a 'portrait drawing book'. This redirector, in turn, leads to a large number of other PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector URL indicates a malicious intent to direct users to potentially harmful content.

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=portrait+drawing+book+pdf+free+download In PDF document text
    • http://files.roofingincentralarkansas.com/uploads/1/3/2/3/132302870/lobosologa-bumelafezuralew-vosodalevumum.pdfIn PDF document text
    • http://files.hersheyblazetc.org/uploads/1/3/0/7/130738641/dinewosorajo-dudoxetaba-gadadadob-dewopik.pdfIn PDF document text
    • http://files.tecsmithinc.com/uploads/1/3/1/4/131407802/8897386.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/1/0429/4819/8556/files/20670413629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/jezad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/3126_cat_engine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/zujulikuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/bestanden_samenvoegen_creator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/d3_table_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/sezopolaror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/48190744163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/door_knock_sound_effect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/taman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/70851064862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/60680152366.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 5

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_off00004993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4993 5328 bytes
SHA-256: 0b76f0e30a6d73d0183f33b36df967fe8afd0462ab885aab168d72c69cb96d5e
font_01_sfnt_off00005bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD4 9520 bytes
SHA-256: 65d8939b923e89068114aa1e91f6666ba0ba06c58d99aea3566feebbecebe83f

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