Malicious PDF — malware analysis report

Static analysis result for SHA-256 8019c5d3a32f171a…

MALICIOUS

PDF

49.0 KB Created: 2020-07-23 16:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 626c3b71b941a921a26186d21b3a05ff SHA-1: 8837adca1facc88109d7ff8a9daf1af58b6b3234 SHA-256: 8019c5d3a32f171ad8b3c747aa5caad1607843efe1f96fbe0d3bb623d9901426
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, specifically pointing to 'ttraff.ru'. It also features a large number of external PDF links, suggesting a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are designed to lead users to potentially harmful content.

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/wb?keyword=belden%203106a%20pdf In PDF document text
    • http://files.redneckfest.org/uploads/1/3/1/8/131855992/3967369.pdfIn PDF document text
    • http://files.glaston-bury.com/uploads/1/3/1/4/131437878/wirubab.pdfIn PDF document text
    • http://files.kikwetujournal.com/uploads/1/3/2/7/132712214/jevotigumozunadokasa.pdfIn PDF document text
    • http://files.ballfamilyqt.com/uploads/1/3/1/4/131454505/ae6fa8423088159.pdfIn PDF document text
    • http://files.radovansebesta.com/uploads/1/3/2/6/132695679/jaxawerifef_vidapi.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/1/0431/8360/3873/files/linalimobanajoxuwuvarevon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/dovibijafem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0704/1958/files/rafizajakavorivonodogob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/fulurogozebiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/60538998211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/63054751655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/46721606636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/68653321298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/29260779961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/tajekar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2029/6090/files/86459238376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/29519132692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13534048661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.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_off000075ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 4872 bytes
SHA-256: f3230191c41c6027c0653572b250ad9423022800f856485a26dd03b436260e42
font_01_sfnt_off0000867f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 14960 bytes
SHA-256: b37838567c2ee4b472fd11b6b75b1b48ad696a7b5cb2722015ae8e569448c5ab

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