Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c66ef6e73f93dca…

MALICIOUS

PDF

54.5 KB Created: 2020-07-28 18:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b985406efc41ffaf7126cf803be416de SHA-1: f8be4d130653ee38b833c6da9338c9b8c0f2337d SHA-256: 6c66ef6e73f93dcabe5aedb7339983c3c5b2c4b2a152c1d15c5a85f0e1e0995e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious URLs indicates an attempt to redirect the user to harmful content.

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.com/pify?keyword=ikea+catalogue+pdf+2012
    • http://files.physicallyeducated.com/uploads/1/3/1/4/131454436/af4794d99eef23e.pdf
    • http://files.annagalatirealtor.com/uploads/1/3/0/7/130776718/979473.pdf
    • http://files.curtisnewmanartist.com/uploads/1/3/1/3/131379590/pobunolekizigidazigu.pdf
    • http://files.theflyingcannibal.com/uploads/1/3/0/9/130969424/dulodedugaj-gokopotuki.pdf
    • http://files.jjsatthecopperpot.shop/uploads/1/3/1/8/131856276/ec874ec631.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/16939839153.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/88339564109.pdf
    • https://cdn.shopify.com/s/files/1/0429/9309/0714/files/bosolozegaresa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/74286434229.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/bolafosupomam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/86135804305.pdf
    • https://cdn.shopify.com/s/files/1/0438/0858/7933/files/92736567467.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/wiseximipinefako.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/guxizixizajiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/48285236442.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b49.bin
1e5fe3617637f7c091fd8e452983b75e8e91dee1cf1e728fa5358544931e9d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B49 5104 bytes
font_01_sfnt_off00009cc0.bin
06d478d441999fb22ce57109d0ffc8f910f9d8eb7703ffce853ceeb37a6879a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC0 15276 bytes

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