Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f242eefed3d6ac…

MALICIOUS

PDF

39.2 KB Created: 2020-09-02 23:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aecb68e214b7e7c3e005f2169c315430 SHA-1: fcf65525d93edf7b7f11bc12755765e072553c20 SHA-256: 26f242eefed3d6aca1976954d93ade7f9f3b20dc3ca8d35efead7f54a58581bc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. Additionally, it features a PDF link farm heuristic, indicating a large number of embedded links, with the first being 'cdn.shopify.com/s/files/1/0429/4492/1766/files/lofal.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URLs, reinforcing their malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/wix?keyword=dokkan+android+cell+saga+tier+list
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/lofal.pdf
    • https://cdn.shopify.com/s/files/1/0434/2844/6358/files/93433861840.pdf
    • https://cdn.shopify.com/s/files/1/0435/5224/3861/files/68618222258.pdf
    • https://static.usrfiles.com/ugd/7598fa_6261f3138dd149d495d28e6a3bb2e9fa.pdf
    • https://static.usrfiles.com/ugd/09c3c7_6b81179552ad4dafbf2b5528b6cc2556.pdf
    • https://static.usrfiles.com/ugd/db93e9_4d168aa770bd4109a00bdea55f2b0a60.pdf
    • https://static.usrfiles.com/ugd/e78b77_69c4011db60044509641657990977a5c.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/fimix.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/levidalujidetiwutoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/armed_banditry_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niborenegukudokeregus.pdf
    • https://static.usrfiles.com/ugd/0d089b_cbac5465d7a84a8884cef03cdbc1db23.pdf
    • https://static.usrfiles.com/ugd/3b47cb_af57b83591574327ac1d335d60328d2b.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_off00005bfb.bin
3ca43efd636dd3f78ed6556ef99f31333083463728d5b0d3f4ceb177676d83a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFB 5172 bytes
font_01_sfnt_off00006dae.bin
c2f633c51b974bf9a3609b8d8817aea0f31dc40ece431e9eb601ab3c5fd943f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAE 10128 bytes

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