Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ca5fbd202bc69e…

MALICIOUS

PDF

38.7 KB Created: 2020-08-13 11:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d88c5046f62dfce925c04a10cb92b4 SHA-1: 1a1e353f994bb4adca1f5e08c89d11a9c4ae6481 SHA-256: d3ca5fbd202bc69e31f20499e13cd001760c385c2abd5f35275500dc33364b4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=corpse+bride+piano+pdf'. The document body, though heavily obfuscated, contains references to this URL and a list of other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting the user to a malicious site.

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/pify?keyword=corpse+bride+piano+pdf
    • http://favugaruv.madonna-gamosvaptisi.com/uploads/1/3/1/3/131379578/83b344f5e014c98.pdf
    • http://files.gettingtogethernow.com/uploads/1/3/1/4/131409909/gejebujevijome-buvarutulowubib-lasovekazotub-gupifewawatepop.pdf
    • http://files.lipsbylil.com/uploads/1/3/0/7/130739239/f9fd32ef.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/sibijepatux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/78852786494.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6967/files/nexerozorifijel.pdf
    • https://cdn.shopify.com/s/files/1/0437/0232/1307/files/8_facts_about_barberton_makhonjwa_mountains.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/roots_and_affixes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/23023499261.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/bubibexajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8336/5528/files/8282808348.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/86905098774.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/82708880908.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8805/files/business_plan_market_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/geometric_design_guide_for_canadian_roads_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0989/2767/files/ramomorewemejel.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/3d_animation_courses_books.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ecc.bin
9af441e8cf92c16baf943bc3e2b93e44f488276eb46901736d530833a879d885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECC 5048 bytes
font_01_sfnt_off00005ff9.bin
a5f8ae64ea5269ccfdc1bd2345f821bc2bea49d892ca4f136c6e106d317b5b9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF9 13692 bytes

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