Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c402b7cb624860…

MALICIOUS

PDF

48.6 KB Created: 2020-08-20 07:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dae2111f17ed69d0c0a7dfa74eea692c SHA-1: da046b7d72cf0c9fbd5867a9d1f6aefe887c2018 SHA-256: c0c402b7cb624860a0506135f51efa1598930573ce9adc6a11f81dc136327664
152 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 pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL and text related to the Google Play Store, suggesting a phishing lure. The presence of numerous embedded links, many hosted on Shopify, indicates a link farm strategy to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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=google+play+store+app+on+ipad
    • http://files.bartlettsmath.com/uploads/1/3/1/4/131483097/32dad57b.pdf
    • http://files.milltownmonitor.com/uploads/1/3/1/3/131379830/kaxediki.pdf
    • http://files.nzepiphytenetwork.org/uploads/1/3/1/4/131453455/2790285.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/woritexinazosilubi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/tesezeribevomeduzewuru.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1158/files/55352387149.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/nogexolegufomar.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/bouncing_balls_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/1089/9624/files/pokijok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/28165312552.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6370/files/nikemedimikero.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/sasowigokijosijubepux.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_off00007ee1.bin
3a638c195b4647bb8cc2bd2a329060c1934c576231a3986a67fa4cddda52d330
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE1 5260 bytes
font_01_sfnt_off000090dc.bin
c97e40a79f32d3de782ec7e010570d30eebf3da34e929a8f2cdd5e1168367a9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90DC 10668 bytes