Malicious PDF — malware analysis report

Static analysis result for SHA-256 895c3a8c27b0f35c…

MALICIOUS

PDF

50.6 KB Created: 2020-08-06 06:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b3761874c81ecf6cd085a0e10bca82a SHA-1: bfa0f7e7f6690c288ea8714e3235d1008d6b6b07 SHA-256: 895c3a8c27b0f35c6e2b4e2d74754adb3a214f43a247d70b9c8d2549270fe69e
202 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links that redirect to a known malicious redirector, ttraff.ru, disguised as a "free download" lure. The ML classifier strongly indicates maliciousness. The document body and heuristics suggest a phishing or scam attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=english+questions+and+answers+pdf+free+download In PDF document text
    • http://files.theolneygroup.org/uploads/1/3/0/8/130814132/4684358.pdfIn PDF document text
    • http://files.cejdentalaccountants.co.uk/uploads/1/3/0/7/130775853/winuve.pdfIn PDF document text
    • http://files.binnsqualitymeats.com/uploads/1/3/0/8/130874154/4fcf5b.pdfIn PDF document text
    • http://files.evemarieshahoian.com/uploads/1/3/1/3/131398504/2015596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/38257369474.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/lion_king_circle_of_life_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/313075025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/76355261922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/zovalutobosima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/47536513216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/75311035183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/begatimipuburuwawenulapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/xidavakojiredo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7582 5360 bytes
SHA-256: 3207e48d73e5f242ddfb435efbab763d95040d234f7b694ee6f6760b054f4783
font_01_sfnt_off000087be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 12160 bytes
SHA-256: 25a70c72fb96d38e9a8f892d22374d7be688324cebc1ac89a130cdbfe98d5d64
font_02_sfnt_off0000aef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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