Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1fb3811f4841b4…

MALICIOUS

PDF

41.3 KB Created: 2020-08-26 16:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f966e225246ce15c2fc9357d63bcff28 SHA-1: d800978288b983128310f976c7a6cecd1d605f78 SHA-256: 4f1fb3811f4841b44ecd1fd00fd17023fe4fbc9d6bc273770ca087f5ec67fbd4
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary one leading to a Shopify domain. The ML classifier strongly indicated maliciousness. The document body, though partially garbled, contains the malicious URL and references to financial speculation, suggesting a lure for phishing or malware delivery.

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=bir+borsa+spek%25C3%25BClat%25C3%25B6r%25C3%25BCn%25C3%25BCn+an%25C4%25B1lar%25C4%25B1+e+k In PDF document text
    • http://files.kendraleighmakeup.com/uploads/1/3/1/8/131856433/mazisuzefedum.pdfIn PDF document text
    • http://files.pjpexotics.co.nz/uploads/1/3/1/4/131407918/95bb753.pdfIn PDF document text
    • http://makonorim.artfeltcollaborative.com/uploads/1/3/1/4/131408103/voxazewafe-jemolixelam.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/1/0436/1024/3230/files/reservoir_induced_seismicity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/best_websites_to_albums_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/video_player_hd_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/52085108663.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/hillsong_worship_songs_mix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/breakout_edu_answers_ready_player_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8900/2645/files/zuxovujonubaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4411/8428/files/beminejilekazaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/4297652448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2145/8853/files/vocabulary_words_for_grade_2.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 5

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_off00005ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFD 5356 bytes
SHA-256: 157ddc5d312f52629fa5165dea7bb4071e8ba6beaef9b72cbb5074dbe8c7182f
font_01_sfnt_off000071c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 11776 bytes
SHA-256: e054c2324a035ffa3fa288c96e9abf8ea534f213a274afd0ee0c1e5e6c296ff8

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