Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a877af2b8abe07…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 16:18:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: abf9b9fc545009090ccb1dc2f5bad1a3 SHA-1: 9a06984285a2025ad744fb805b0719c90ec8feda SHA-256: 91a877af2b8abe078cc47a71c43af8b2a6b396b111c6e8c6659ae056919395a9
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to Google Sheets formatting and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous Shopify-hosted PDF links further indicates a link farm strategy to improve search engine ranking for malicious 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.com/pify?keyword=conditional+formatting+google+sheets+character+count In PDF document text
    • http://vetabof.zuyu66.com/uploads/1/3/1/4/131407089/xajubixinozebazaruna.pdfIn PDF document text
    • http://vuboba.beckervetclinic.com/uploads/1/3/1/3/131383314/9349671.pdfIn PDF document text
    • http://files.healthbyhannahjean.com/uploads/1/3/2/7/132740482/luxurujupevu-pexiwin.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/1/0463/3044/5981/files/toy_blast_game_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/silekizezimepajetidomok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/zosoduvus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0424/8484/files/thousand_miles_tove_lo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/let_it_be_beatles_noten_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/83380344166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8826/2821/files/85972439248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/wegefexejifewolexuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0894/8386/files/23748791497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/arbeitsvertrag_ausfllbar_minijob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/lifukavuvigilavetigapega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/59720102435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/18026758620.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 2

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_off00005ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF4 5340 bytes
SHA-256: 4e16319db81aeb906cfabdfe239d373dea97bd7e5ad820154f8a379e2ff57ff6
font_01_sfnt_off000070f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 10392 bytes
SHA-256: f59f2a91526c6fcb07d9fa7a5b4cf323c5c4dad5bf8696f14a625d077dd1dec1

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