Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b1d0f4a7f77c765…

MALICIOUS

PDF

41.2 KB Created: 2020-08-31 22:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b1105c653eec6886e70a9c9db1c0ca2 SHA-1: 5ac248af524ef47178931f7bc235b0f2c44274da SHA-256: 6b1d0f4a7f77c765a5d5ff40e77e570ac25b44d79d013b43e4c85bc688168e14
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing indicating it links to malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to comparing Excel sheets and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to a harmful site.

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/wix?keyword=online+compare+two+excel+sheets
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/game_bid_wars_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/john_deere_x728.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/33248271508.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6266/files/helly_hansen_sailing_jacket_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/baguzosulosekosaxut.pdf
    • https://static.usrfiles.com/ugd/b8c837_67e202df558441b9b48a5e8b9e5731da.pdf
    • https://static.usrfiles.com/ugd/5b604d_d5d29b8d6d52427492268b1cfc517e37.pdf
    • https://static.usrfiles.com/ugd/345929_8ec320001a9344839ffe9c4340769456.pdf
    • https://static.usrfiles.com/ugd/bb13a2_5c88a7e67f8d4b0b86c4dc12cdfc1747.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1d647e7ac2440828571b6ab4efba626.pdf
    • https://static.usrfiles.com/ugd/362633_15bfce5290e54a41a57bfc807183b60d.pdf
    • https://static.usrfiles.com/ugd/8acad3_3933fd8fd9a548bc9d5230cb8dcacd64.pdf
    • https://static.usrfiles.com/ugd/bb13a2_47bd640941d94a6ea360002508ab734f.pdf
    • https://static.usrfiles.com/ugd/a48928_0fde38cda03642dabb6cd4c5507976f4.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_ff17a9bfe02d423fa3501ba563574f26.pdf
    • https://static.usrfiles.com/ugd/de65f7_02bcb7bfe3294d8293ebbfba00af0705.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_off000062fe.bin
c48b4a2f64fd36e52d3c80896977b270f51aa003307a6888b9b6db42b6b568a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FE 5360 bytes
font_01_sfnt_off0000751c.bin
7895293751eb1faf65c98cc183091eb9cb1fb978cd4a4f20eef6d4ddc7281265
pdf-font-stream PDF embedded font (sfnt) at offset 0x751C 10224 bytes