Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b7deff2576da34…

MALICIOUS

PDF

38.1 KB Created: 2020-07-27 21:13:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df874f1aa662090c968f113458f90627 SHA-1: f8eaa81d5bb5f823e516215ab6b31ac39620e14c SHA-256: 76b7deff2576da347da026678037cc3bdf3e3eb753b3f23664b5cea3e0734ad9
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 'ttraff.cc', and another for a large PDF link farm hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Wwe world championship video', suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to malicious infrastructure via the embedded link.

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=wwe+world+championship+video
    • http://files.mawptacoma.com/uploads/1/3/0/7/130739072/dawijuwebi.pdf
    • http://files.homegrownpets.com/uploads/1/3/1/4/131409074/835770.pdf
    • http://files.monteranderson-author.com/uploads/1/3/1/6/131637896/lezenuzunujananit.pdf
    • http://files.valleytemp.com/uploads/1/3/1/4/131411542/zirexim-fubabujedikiko-zusabavenopeta.pdf
    • http://files.friendsofcharliesplace.org/uploads/1/3/1/6/131606407/e4b89.pdf
    • https://cdn.shopify.com/s/files/1/0437/8106/2805/files/95699104671.pdf
    • https://cdn.shopify.com/s/files/1/0434/1111/2092/files/dameri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/89689927162.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/lotanagate.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/86642354406.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/27980226645.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/domimoset.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/tokotonexubarujazo.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_off0000575f.bin
56227ff6f0c467332c1590b719806a4cbb3254151fecabadc9e19f47f4d604fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x575F 5188 bytes
font_01_sfnt_off000068df.bin
3ebaef051e63b323fc3c5bfa101ad0710398fa259db44abfa1183c4628fe58b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x68DF 10096 bytes