Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d85633e4ba7b11…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 18:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b545d05b284782f52349be9ddaf70079 SHA-1: af23e6862a2a326791d390566f1855a3905b58e2 SHA-256: 77d85633e4ba7b115aa2d900aab27d916b6571362833cd2d472e26303e1d770b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'dissertation report means' and includes the malicious URL, suggesting a lure 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=dissertation+report+means In PDF document text
    • http://files.iliveinmycarandeatverywell.com/uploads/1/3/2/6/132681931/97eb25bb1bc37b6.pdfIn PDF document text
    • http://wowalo.johnhunterdesign.com/uploads/1/3/1/4/131438216/kuvujutimuf.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/1/0429/3260/0985/files/jebikabojirofekuzetigof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/mamavomuniz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/puxusopupap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/39975830167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0490/3073/files/41464478079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/foxovakulelosadisesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/xegazed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/82541839677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/comment_citer_un_dans_une_bibliographie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/how_to_center_a_div.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 3

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_off0000657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 4932 bytes
SHA-256: 8c6b47566ba60510f902bda4600a928d374878da84fa800e1c2d993ffd94574b
font_01_sfnt_off00007628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7628 10976 bytes
SHA-256: 3203db3cb13d954ae4a55cc249dfa4e25f213157d7a12ae37cf25db458484bc6

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