Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bef5001e4630f0…

MALICIOUS

PDF

50.5 KB Created: 2020-08-25 21:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41a2230d8b2e3e5eb5fabce01954b5d9 SHA-1: e4a0a09489246717ec8f71d3ad37425e05fa91c8 SHA-256: 83bef5001e4630f08be69afc2851d706337cc4641bb391daf68e6e1cab9f4b9a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL is `https://ttraff.ru/pify?keyword=geometric+dimensioning+and+tolerancing+symbols`, which is also present in the document body. This suggests the document is part of a link farm or SEO poisoning scheme designed to drive traffic to malicious sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links indicates a malicious intent to redirect users.

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=geometric+dimensioning+and+tolerancing+symbols In PDF document text
    • http://files.gethilineinsurance.com/uploads/1/3/1/6/131607269/8187401.pdfIn PDF document text
    • http://files.vcinfocus.com/uploads/1/3/1/4/131437799/3549394.pdfIn PDF document text
    • http://files.atolsu.com/uploads/1/3/0/9/130969831/pelusuw.pdfIn PDF document text
    • http://vused.thepowerofpainting.com/uploads/1/3/1/8/131856326/luxofiboxeri-lurupaf.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/1/0459/2553/1815/files/cccam_emulator_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/autoecologia_y_sinecologia_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/abide_with_me_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/77639488757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/41156821594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0055/1845/files/foturogokowuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9179/5873/files/39510545142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8774/files/fujafifoxavir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/94819658964.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 6

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_off000086e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E9 5532 bytes
SHA-256: 0faa73b4d467befe59263bec725790c4bac676877efa12060ac3ea69c17918c0
font_01_sfnt_off000099a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A8 10508 bytes
SHA-256: cae737bd1cd9d29313818830378bccac2bad34ba0d21aa590bd35ca2464f617f

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