Malicious PDF — malware analysis report

Static analysis result for SHA-256 100381c2ed7366ee…

MALICIOUS

PDF

35.2 KB Created: 2020-08-22 07:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14723d9c47f032cbf9cf78cd2d5847bc SHA-1: 0b0b9fe75fdc8ff9a57631a41fe3f957d1a26ed6 SHA-256: 100381c2ed7366ee3c59121f90e3f60651bf6ff8ba6d2999e4ef1bc45ca7381e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector URL (https://ttraff.ru/pify?keyword=formation+of+tetrasporic+embryo+sac) used in a link farm. This suggests the document is designed to direct users to malicious sites, likely for phishing or malware delivery. The ML classifier also strongly indicated maliciousness.

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=formation+of+tetrasporic+embryo+sac In PDF document text
    • http://files.tankuanaw.com/uploads/1/3/1/3/131379612/eda4253071.pdfIn PDF document text
    • http://nuzimanef.artisanbuildersconstruction.com/uploads/1/3/2/6/132682790/9464f3f.pdfIn PDF document text
    • http://files.wodintl.org/uploads/1/3/1/6/131637482/nebajevasigudasop.pdfIn PDF document text
    • http://files.socialhousedesigns.com/uploads/1/3/1/4/131453498/wamuwamul_remofove_takipenexawuw_wiwosaxiruja.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/1/0432/8649/5397/files/antenna_engineering_handbook_jasik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/vatamemavobosunaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0359/2094/files/gographie_politique_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3871/9648/files/xokabekakipesaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/65736792289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54183348773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6099/3943/files/dabuvipodekufaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8651/9197/files/the_art_of_boudoir_photography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2905/9994/files/22700385312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9572/7007/files/3134673148.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_off00004aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA0 5324 bytes
SHA-256: 54e0ad3e50ae55a9c11a2b5f2ac8eaab4af12faac70cda8e7fa91c5240aa824d
font_01_sfnt_off00005ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA9 10396 bytes
SHA-256: e08210df791b8c63032a365698d0a9d9f705eedbcc3898f59dc49e959980847b

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