Malicious PDF — malware analysis report

Static analysis result for SHA-256 b351093f405d94cf…

MALICIOUS

PDF

47.7 KB Created: 2020-08-16 17:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b179f08e17ecc8a56f738297faf2238c SHA-1: 7f335d23f0f29d7999182b18bcec9502349b9356 SHA-256: b351093f405d94cf766a6ba320dd7226f1c982db45740241205dde09c43b0392
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning technique used to distribute malicious content. The primary malicious URL is https://ttraff.com/pify?keyword=bruchrechnen+addition+und+subtraktion+pdf, which is likely used to redirect the user to a further stage of the attack. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=bruchrechnen+addition+und+subtraktion+pdf In PDF document text
    • http://files.heimler-international.com/uploads/1/3/1/0/131070561/9650110.pdfIn PDF document text
    • http://files.childrenscookingclasses.org/uploads/1/3/0/7/130740429/923355.pdfIn PDF document text
    • http://files.prooutboard.com/uploads/1/3/0/7/130775018/9dec4b1be7f0.pdfIn PDF document text
    • http://files.harpoonreview.com/uploads/1/3/0/7/130776458/fixobuxeda_nekakupo.pdfIn PDF document text
    • http://korabim.fulfilledshop.com/uploads/1/3/0/7/130776008/be89ae1c2.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/1/0438/7710/5832/files/wexideligazufivapozojel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/13612363281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/24246955175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4295/3626/files/sobekiwazitulofo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/mexew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/stochastic_oscillator_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/43621491491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2877/3021/files/71785844482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/zugevanusijolixemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6899/5222/files/12771669087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/84597556474.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_off000072a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A6 5464 bytes
SHA-256: 0f76c5cf46b93c0d7eb353302906b00bcaaef757f6d156acb27647c10346e44a
font_01_sfnt_off00008530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 14156 bytes
SHA-256: 5d0ac7c04bdd203fa41c643068f9e65b78d3473857a83771eb7bc2c1123cc107

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