Malicious PDF — malware analysis report

Static analysis result for SHA-256 4351871a380f385e…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 20:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5741bb48b571430be4366c26f8bd6a03 SHA-1: 427d73df35de3a6527213012dd1f969ada606726 SHA-256: 4351871a380f385ec5148ea3b8dd70ed3cd59719ac4447cbf77111b54449c814
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.ru', which is likely intended to lead the user to a malicious payload. The document body, though heavily obfuscated, contains the title 'Angle properties of polygons worksheet pdf', suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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=angle+properties+of+polygons+worksheet+pdf In PDF document text
    • http://keloru.cafezippy.com/uploads/1/3/1/8/131871486/133eba2.pdfIn PDF document text
    • http://files.patagoniafallfestival.org/uploads/1/3/0/9/130968933/zonenivasufonal_rolijavafu_sezefasuronu_nimonufoluxup.pdfIn PDF document text
    • http://files.laptopupcycle.org/uploads/1/3/1/4/131409442/6c42a.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/1/0428/9812/9059/files/46840234396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7304/4647/files/86201522109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/48124596864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/limewirw_for_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4751/0435/files/56079414311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/31346772369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/ethnicit_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/37349854221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/digital_electronics_full_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/gigegamomixepawiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/berserk_volume_12.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00006021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 5340 bytes
SHA-256: 9d01db9dbdda8e2916fdff78f0cda341508cb2b9895854036bd88f884e84837b
font_01_sfnt_off0000725a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725A 10096 bytes
SHA-256: a8b3c831976f7dbd57c505a4ba3bd61c7fb34246f630661d99fd1a4c3f905efc
font_02_sfnt_off000094bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 16120 bytes
SHA-256: 2a726e4d8e078a4a4a6a0bed67b139344cab8167eb027720faf42c08020076b2

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