Malicious PDF — malware analysis report

Static analysis result for SHA-256 085d148f113d9a78…

MALICIOUS

PDF

62.9 KB Created: 2020-08-09 17:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50890e35abfb93cea24a22a2a9fc884f SHA-1: 39a6eacdee0d7481392e8c345f84eaa271725740 SHA-256: 085d148f113d9a78fcdab2f52f223a459397a9cc452aa145609c395dcc440da9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector, specifically designed to lead users to a link farm for SEO-based phishing. The primary malicious URL identified is https://ttraff.cc/pify?keyword=makalah+filariasis+lengkap+pdf, which is used in conjunction with a large number of other links, many hosted on Shopify, to create a link farm. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=makalah+filariasis+lengkap+pdf In PDF document text
    • http://files.susanemshwiller.com/uploads/1/3/0/7/130775639/pixixeselega.pdfIn PDF document text
    • http://files.pagesinkandpaper.com/uploads/1/3/2/7/132740743/df180e.pdfIn PDF document text
    • http://files.boshamretreats.co.uk/uploads/1/3/1/4/131407152/wozinewefokiji.pdfIn PDF document text
    • http://files.ksguns60478.com/uploads/1/3/1/6/131607683/5221686.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/1/0435/0436/9816/files/1839882047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/jetezedugewuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/2895978626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/57060216186.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/cpu_scheduling_algorithms_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2945/5263/files/59027720270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/prelude_in_g_major_rachmaninoff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/podupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/fomurivofezigusedupemazif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/24888525880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/madozoxunotexu.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_off0000b90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90C 5372 bytes
SHA-256: 7afa0b9cd5c8dbd95ae4c335da056ff69c6a5588737804305b2380075dc5662b
font_01_sfnt_off0000cb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5A 10344 bytes
SHA-256: 1b052c429427c2f72f4f662dd9578a03c5f733b15704e1f874cfb8fcc24f7828

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