Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c760a4389c65ee…

MALICIOUS

PDF

55.4 KB Created: 2020-08-05 05:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 785c45d77fb537e6471321cd9c00c653 SHA-1: 03d0b48b172404675cc3571b3ee08802240313dc SHA-256: 51c760a4389c65ee634210bbb79c8641c48d7d2f602a0adb6f15092e9d26e501
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=bodybuilding+training+manual+pdf', which is also flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites under the guise of providing a training manual.

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=bodybuilding+training+manual+pdf In PDF document text
    • http://files.pointofdeparture.pro/uploads/1/3/0/9/130969330/0fd79.pdfIn PDF document text
    • http://files.thomasnaturalhorsemanship.com/uploads/1/3/1/4/131437276/wofixumo.pdfIn PDF document text
    • http://files.rokalumnaedst.org/uploads/1/3/0/9/130970009/b6ebf.pdfIn PDF document text
    • http://files.soulsearchrecords.com/uploads/1/3/2/6/132683154/ravomot.pdfIn PDF document text
    • http://files.winslowyorkrite.org/uploads/1/3/1/6/131606343/xolagofotujijuvax.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/1/0437/5409/4753/files/87818730561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/67205698185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/jogonoteve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/14436001516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/50807014776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/nurofamonolavovera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/muritosuwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/jirufodofudusugiwude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/takutixomiwejorikad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/povipogoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/quaint_contraction_crossword.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9988/9571/files/sawovivonenesixixa.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_off00009bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEF 5476 bytes
SHA-256: 21210f1dff03df0b773b054cc578ffb04f2fdf862ebea6e7e748ae4101885ee6
font_01_sfnt_off0000ae86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE86 10012 bytes
SHA-256: 6ee1756f2e695055e5e31139e7ecec54b96bc47475ec9b0a32e71c8007c5da2f

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