Malicious PDF — malware analysis report

Static analysis result for SHA-256 017810a30c751e40…

MALICIOUS

PDF

54.7 KB Created: 2020-07-08 20:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae41236cd1c88922aa6af6aea9b4978 SHA-1: 5ef0290902aa914e30d2ffc8a27efb03bb0ca068 SHA-256: 017810a30c751e4040bbc61f2d902f9003529e33d3d1b448d7018f34438ac3d5
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One prominent link redirects to 'ttraff.ru', a known malicious redirector. The document's structure and content suggest a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. No scripts were extracted, but the primary attack vector is the extensive use of malicious and redirecting URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=fasciite%20necrotizante%20pdf
    • http://files.rascalmartinez.com/uploads/1/3/1/6/131606335/2837757.pdf
    • http://files.forgedtecholsters.com/uploads/1/3/1/4/131437225/fedepidun.pdf
    • http://files.melissagunasena.com/uploads/1/3/1/4/131438468/josobivituraki.pdf
    • http://files.magiqatlas.com/uploads/1/3/0/8/130814513/zivatemurijupizowigi.pdf
    • http://files.ninsandneedles.com/uploads/1/3/1/4/131414516/papereji_xobefufaxezel_nebaru.pdf
    • http://files.liquidsunshinedesigns.net/uploads/1/3/1/6/131606644/6427307.pdf
    • http://files.seedingreciprocity.com/uploads/1/3/1/3/131398367/1518556.pdf
    • http://files.tworiversrecovery.com/uploads/1/3/2/7/132740860/91cf8adff.pdf
    • http://files.artoutofdakota.com/uploads/1/3/2/6/132695493/4805215.pdf
    • http://files.mccoysactionkarate.com/uploads/1/3/1/6/131637919/tameb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nojilibap.files.wordpress.com/2020/06/nigagirobilaremazogezud.pdf
    • https://dofakava.files.wordpress.com/2020/06/gavelufuvurunema.pdf
    • https://satugovanuw.files.wordpress.com/2020/06/65748571018.pdf
    • https://wegekenir.files.wordpress.com/2020/06/66825243473.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bizisumexu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000957b.bin
13876d5444f48f269863602f65cf54623beac98719d76ff27c09c43b546f487b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x957B 4912 bytes
font_01_sfnt_off0000a635.bin
505f9f3d7d2a90f2809f7be8de5a2096a813dbc31285b6d3882abbec57a54b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA635 13328 bytes

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