Malicious PDF — malware analysis report

Static analysis result for SHA-256 840d03172fa7eb81…

MALICIOUS

PDF

45.9 KB Created: 2020-08-20 14:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f7e6d26a055752359a63e2d49b2eae1e SHA-1: 077d939b7bc60fe144cf66f74b8083a4e6d7119e SHA-256: 840d03172fa7eb81e0be03c84b737e326eeb3d5f9e638c907e0bb0ad99b3f27d
194 Risk Score

Malware Insights

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

The PDF contains multiple links, including one to a known malicious redirector at `https://ttraff.ru/pify?keyword=samsung+galaxy+a5+theme+store`, suggesting it's part of a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to a 'Samsung galaxy a5 theme store' and the authoring application, indicating a lure to entice users to click on the malicious link. The presence of numerous PDF links further supports the SEO link farm heuristic.

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=samsung+galaxy+a5+theme+store In PDF document text
    • http://files.bdac.ca/uploads/1/3/1/4/131452887/9584096.pdfIn PDF document text
    • http://files.cultivatecornwall.com/uploads/1/3/2/7/132741189/374216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6844/0224/files/wugemenekulajaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/maxijirikubovabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/journal_irritant_contact_dermatitis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/ergonomic_chair_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/britax_b_agile_stroller_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/nitekajovum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6027/1006/files/business_model_canvas_airbnb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6634/9975/files/wanna_one_boomerang_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/lvm_commands_in_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/48903557496.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/jifegamomufev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3680/1184/files/jorupimojagok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 5332 bytes
SHA-256: 1b667d5fe986de9d2bbcb0f0924f22ff55281de145396e3f77263aabf1d041fb
font_01_sfnt_off000078fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 10524 bytes
SHA-256: e67336f839bae001447db026e283a81f70a3b3fe9a103dc62ce4b87bb4f0343a
font_02_sfnt_off00009cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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