Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b8077a6f233914…

MALICIOUS

PDF

63.8 KB Created: 2020-07-30 20:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 866e60c83f4f67b485536ae2122bb640 SHA-1: 7a3f0ef609d5daf2f8811421dfedfa95235812ca SHA-256: 42b8077a6f23391452c9de038ca5d33745725e3d81613979713e3f5ef6f999cd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another heuristic indicates a large number of external PDF links, likely for SEO manipulation to improve search engine ranking. The document body, though heavily obfuscated, contains text related to 'carpentry pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious links. No scripts were extracted from this sample.

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=learn+carpentry+pdf In PDF document text
    • http://files.numinousmusic.com/uploads/1/3/1/3/131380001/2ee083c587.pdfIn PDF document text
    • http://files.jandrfashions.com/uploads/1/3/2/6/132695543/4257190.pdfIn PDF document text
    • http://files.alannastephens.com/uploads/1/3/0/7/130739916/gamikavex-lowogogilirasim-letufizujijow-laluxogazewawu.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/1/0434/7494/4153/files/wajewixaxosuwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/89879196881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4637/7374/files/sukupazivinotam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/vamitopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/97370672810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/69737456058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/bavawonetixigel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4086/4421/files/64516811171.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/waborojepadovufipukep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/kojimokotelupopasoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/zevopuworit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/gitezabewapujefumesekatuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7329/6801/files/77693129950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/89765294990.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
🗂 Part of campaign: allinthestory.com 3 samples

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_off0000bfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB2 4612 bytes
SHA-256: 45c4d42ea8fec9e0c3fa3e51bca98291fbaf4120b0c69a446fe67e6ae5eb7fbc
font_01_sfnt_off0000cf68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF68 10156 bytes
SHA-256: 6604906c2f88a7b333b2f04f5e5cbd8b68a5a5103cb6d585eb1ca9835f85c750

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