Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0aec56e049ff17…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 08:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b19359386e32ed652ed6656f5307ed54 SHA-1: 7b2c7db03fdb639b5bf6bdc593d4abaa7154222b SHA-256: fa0aec56e049ff17302e66afe09c0c93e7603586604d7833c68d5bffe047f04c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=james+stewart+calculus+solutions+manual+pdf', is designed to lure users by appearing to offer a calculus solutions manual. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves social engineering through a deceptive document title and malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=james+stewart+calculus+solutions+manual+pdf
    • http://files.architect-mostafa.com/uploads/1/3/2/6/132695294/xewumobeg.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://files.sneakerempireorange.com/uploads/1/3/1/4/131483371/bakutiji.pdf
    • http://files.westchaseassociation.com/uploads/1/3/1/3/131378993/2e5ade.pdf
    • http://files.sillassenhalf.com/uploads/1/3/0/9/130969555/bevijidu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1033/4620/files/96975277229.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/botunelufabotuges.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/vakenavesofuwawufix.pdf
    • https://cdn.shopify.com/s/files/1/0430/6921/0773/files/wipisizenenen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/nazaruwurarifamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/15906815684.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/donavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8099/0366/files/nurezawotejubup.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/93813721618.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/96098175306.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/banev.pdf
    • https://cdn.shopify.com/s/files/1/0433/4786/9850/files/fudapabaporar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0247/files/rewirelepilovon.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/60598025075.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_off00005517.bin
98e5b9b67384318941ddd2771a016db6ada6172b99b51febceec88e614fa4751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5517 5264 bytes
font_01_sfnt_off000066e8.bin
95bdc2f524a45bebb914499bda926a58485da200b66a5b64a4bdd46854a25217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 10436 bytes
font_02_sfnt_off00008a3f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3F 4324 bytes

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