Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa8c65bc0138c07…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 03:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abcbad280cc35b533a6ba4878566807c SHA-1: 86c8ec41b23a02318e38ea42254ed98f76b548a4 SHA-256: 0aa8c65bc0138c07118cee0121fbbc6339a93240bef9ce9bd302290aa9b6db82
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure suggesting a software update, which is a common tactic for credential phishing or malware delivery. It includes a link to a redirector infrastructure, `https://ttraff.cc/wix?keyword=download+asus+live+update%253F`, which is highly suspicious. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector and MFA lure further supports a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/wix?keyword=download+asus+live+update%253F
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/72165922006.pdf
    • https://static.usrfiles.com/ugd/2274a7_799f0e754aae444ca4591641be46fb71.pdf
    • https://static.usrfiles.com/ugd/b8c837_8298f1fa6bdb441c93f0ece271c65248.pdf
    • https://static.usrfiles.com/ugd/55cc32_384cfcce66df4926bc18e9e7ef3b43fe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/tamibuguvafevov.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/canon_mf3010_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/63025846264.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/ayushman_bharat_yojana_banner.pdf
    • https://cdn.shopify.com/s/files/1/0437/6497/3729/files/44877352712.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/2869140646.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/wufogutudujedo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/kerbal_space_program_torrent.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_off000070bd.bin
5441278a170824eca89f4a1e5f22b836b7098c615fea43250a41bfe5e9b5040b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BD 5152 bytes
font_01_sfnt_off0000826b.bin
3fcd46f544554cc4ffa1cb46790ca8062f62c1364d41b4c3126f0d1681665ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x826B 10764 bytes

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