Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda6f4c17ad91779…

MALICIOUS

PDF

60.0 KB Created: 2020-08-09 02:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29e51d11408a760292cc2e9e82e6e839 SHA-1: 7eac4f9b04462f60da150ed16658ecb95a5304bb SHA-256: dda6f4c17ad917791d53dd8eddfd6f5c6a5e173e2783b6cea63f7f78058626ac
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=las+amistades+peligrosas+novela+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking the link. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on shopify.com, further supporting the malicious intent of redirecting users to potentially harmful sites.

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.cc/pify?keyword=las+amistades+peligrosas+novela+pdf
    • http://files.davidvail.net/uploads/1/3/1/8/131871772/vudipurefejame.pdf
    • http://files.hobbyhardwoodalabama.com/uploads/1/3/1/6/131606366/posil.pdf
    • http://files.htmassillon.com/uploads/1/3/1/3/131397946/3348546.pdf
    • http://files.chicagoneuropsychologist.com/uploads/1/3/2/7/132740408/vezipefodujonafol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/veep_pilot_script.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1703/files/xovukovulirejixuxezaxatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/susodixagoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0439/5096/4904/files/35623587189.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1046/files/wuboborek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/furosemide_davis_plus.pdf
    • https://cdn.shopify.com/s/files/1/0429/2247/5687/files/jofidomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/39238116749.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6939/files/luxupobejumumizos.pdf
    • https://cdn.shopify.com/s/files/1/0432/3642/5883/files/73169901187.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c16.bin
62a86366057ee66e5af732202398025a947a591bf0456a06ff07f3fe8480dac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C16 5152 bytes
font_01_sfnt_off0000ad87.bin
f198008c0f36fbf71b0dce87836e98cdd1d4d671947d22f66391f9e9bf657b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD87 11616 bytes
font_02_sfnt_off0000d370.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD370 4324 bytes

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