Malicious PDF — malware analysis report

Static analysis result for SHA-256 144cb483691c700a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 08:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43289a1fe7d4dbe0b342776a97ebc621 SHA-1: c913a8a33a074c875fd67fc5dbf0804b560d44b7 SHA-256: 144cb483691c700ac76d49c543b175a86e0d95cfdec8fb6188b078869aa4071c
234 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to redirector infrastructure or algorithmically generated URLs, indicating a link farm for SEO-based phishing. The primary lure appears to be '401k guidelines 2018', which redirects through 'ttraff.com' to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple PDF links suggests an attempt to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=401k+guidelines+2018 In PDF document text
    • http://files.buildingdecarb.org/uploads/1/3/0/7/130775859/63ddbef4e41e3a7.pdfIn PDF document text
    • http://files.relaxationretreathealthbenefits.com/uploads/1/3/1/8/131856539/5358974.pdfIn PDF document text
    • http://bomawu.shannonbibby.com/uploads/1/3/2/8/132814930/64fef2e3.pdfIn PDF document text
    • http://files.petersburgchurchofchrist.org/uploads/1/3/2/6/132695668/50abea4fd9ecab.pdfIn PDF document text
    • http://files.antiquesg.com/uploads/1/3/2/7/132740424/bf8e42ff1d.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/1/0435/1809/9615/files/tunubogonoxunugexutod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalekubaserigudopen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sabam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/86421529557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9021/files/40683671242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/2015_cadillac_cts_v_sport_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/baldi_s_basics_apk_mod_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/97418403572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/dilupasunidak.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_off00006819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 5264 bytes
SHA-256: 8c47967e5f83905a6a67229762b8c6f8b2efa9be8176c1e37459a1011279cf8c
font_01_sfnt_off00007a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1C 10452 bytes
SHA-256: 90fbec5dd87d5e620c05832738dec222e578797a6a6ce76aa2eac6c9ad2e13d3

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