Malicious PDF — malware analysis report

Static analysis result for SHA-256 f361bf3ab6d44122…

MALICIOUS

PDF

40.4 KB Created: 2020-08-05 23:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f5a0f095158a56c8ebf76a271405b62e SHA-1: 434dff355029251c2a38de2c4becee89b4238d4e SHA-256: f361bf3ab6d441223097217d3b44acbc05416ff4d2ab0f9d030f9f3484efe51f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link to ttraff.ru, indicating a malicious intent to redirect users. The document body, though corrupted, contains the same redirector URL and a benign-looking title, suggesting a lure. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves redirecting users to malicious infrastructure via embedded links.

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=free+abacus+training+pdf In PDF document text
    • http://files.krgriffiths.org/uploads/1/3/0/7/130739704/9940707.pdfIn PDF document text
    • http://files.macroleaders.com.au/uploads/1/3/2/6/132681342/47a574df01f9d6.pdfIn PDF document text
    • http://files.communityartistsgallery.org/uploads/1/3/1/6/131606594/80d77.pdfIn PDF document text
    • http://files.penicuiktabletennis.com/uploads/1/3/0/7/130740138/1437269.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/1/0448/2826/2560/files/small_steps_louis_sachar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/voduzoxoten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/kulepixofuturalujimiwax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/49799123160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/gorogumivubino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7968/6549/files/29416491831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/jodi_picoult_my_sister_s_keeper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/xipejexepofojikuwelam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7622/2118/files/cabeza_de_turco_libro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/mitovuxubit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/78448779717.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_off00005f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F88 5384 bytes
SHA-256: e7e06968157b75802db92659748354acb547d719e5692720fc557e05d386462b
font_01_sfnt_off000071e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E0 10260 bytes
SHA-256: d51b1a376c72fc3d9e041cdf38f2d26bf046f82effa2db46aeaf6c82c57457e6

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