Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a90c1fafc5086c…

MALICIOUS

PDF

45.2 KB Created: 2020-08-15 19:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c1857a66cdcc8ec3279df9f5787c78a SHA-1: 996c7891aefaf24732a776e3d96c9ba8f2d71fe9 SHA-256: 45a90c1fafc5086ce8e7f5a915a7b39480f7a03ff396be21687eb3da4cf6b66b
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a malicious redirector link. The document body, though obfuscated, contains the text "Despido arbitrario pdf peru" and the malicious URL, suggesting a lure to trick users into clicking the link. The numerous links to external PDFs, many hosted on Shopify, indicate a link farm designed to improve search engine ranking for malicious content.

Heuristics 3

  • 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.
  • 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.cc/wb?keyword=despido%20arbitrario%20pdf%20peru
    • http://files.raydickaty.com/uploads/1/3/0/7/130775304/totupib.pdf
    • http://files.samuelpakart.com/uploads/1/3/1/8/131856100/5483001.pdf
    • http://files.recoveryhumanface.org/uploads/1/3/0/9/130969352/08009cbb4.pdf
    • http://fufoz.tinytoesdanceva.com/uploads/1/3/1/4/131453630/kazupigovepo.pdf
    • http://files.christlutheranpeterborough.com/uploads/1/3/2/3/132302892/7110074.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/how_to_increase_indent_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29876283886.pdf
    • https://cdn.shopify.com/s/files/1/0453/2079/8363/files/tisase.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3102/files/81598477350.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/10629929847.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/64281918857.pdf
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/pixel_art_mario.pdf
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/business_informatics_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/98173225237.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/tabosemezob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2099/files/fuzoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/gogesadudezufatakevomejuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7923/files/wimeruguverarida.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_off000070ae.bin
1d1f50079dec4944dc7d6a266edf13f07ba453f7831e15ab05c294c0703cd82f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AE 5140 bytes
font_01_sfnt_off00008236.bin
1e20e267442d3bd90f5ac104a7d15b3ebb47e7050c9de5af2883a03d3ca80caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8236 11588 bytes

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