Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa87311d13bdd856…

MALICIOUS

PDF

34.1 KB Created: 2020-08-13 20:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75a4cf11eb485f6b059a2b959f4be38d SHA-1: e98552535849da310de7dcab2f4ff482a114f466 SHA-256: fa87311d13bdd8569aab56fe23c4cb141426ed6ee8b1a483ce9dcf56fdd84223
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=clipsal+wiring+accessories+catalogue+pdf'. This indicates the document is designed to redirect users to potentially harmful content. The presence of numerous other links, identified as a 'PDF SEO Link Farm', further supports the malicious intent of distributing traffic or content through a network of linked PDFs. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic.

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.com/pify?keyword=clipsal+wiring+accessories+catalogue+pdf
    • http://files.daynasdogsitting.com/uploads/1/3/1/3/131398507/584f622a3b.pdf
    • http://files.freestylefitness.nl/uploads/1/3/1/4/131406811/8700030.pdf
    • http://fubepeko.lrbarms.com/uploads/1/3/1/3/131379578/53f6df.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/basic_english_grammar_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/56583920227.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/96246786256.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/4256081942.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/97091900989.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/tusawamet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34007074416.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/business_plan_financial_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/voxexufigemo.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_off00004716.bin
9a65f811a040e2995d4e265dbb26b1559451ebfba8f44be36e7906f662757d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4716 5320 bytes
font_01_sfnt_off0000594a.bin
556704692815a0c4fb8986cbc3706619ad04f0da574456e1f5ca959c14e9a094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594A 10180 bytes

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