Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a3afad9ebf0d8b…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 15:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88c7c36c81808554300d01ab67c1ce55 SHA-1: 0430545fbbe79be9552c599be4e4315e44bb45f4 SHA-256: f2a3afad9ebf0d8b05acbc4174d79827c0c6afa17dbc52a6033dcee199991134
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords related to fishing reports, suggesting a lure. The PDF also contains a large number of external links, indicating a link farm, likely for SEO poisoning or to distribute further malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.com/wix?keyword=walleye+fishing+reports+washington+state
    • https://static.usrfiles.com/ugd/b8c837_bb6552309b7e46e9aa6fbf016a6e1a8d.pdf
    • https://static.usrfiles.com/ugd/d775a9_019a356bb2d14424b8ae6f0ad6aca50a.pdf
    • https://static.usrfiles.com/ugd/7e6083_b21c02e6adc04ede85a5e811fc73d126.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/70802001401.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0435/7629/5592/files/bittersweet_symphony_chords.pdf
    • https://static.usrfiles.com/ugd/353d00_20005f0b76e04d1e9f719069099d5d49.pdf
    • https://static.usrfiles.com/ugd/a48928_d88bedb05af44424b6c7ee22f63ae129.pdf
    • https://static.usrfiles.com/ugd/f8de3e_f471ad27d4e6449eb5b7019758eb0dd2.pdf
    • https://static.usrfiles.com/ugd/bf650e_0af07941e4744adb876b4843a09c5105.pdf
    • https://static.usrfiles.com/ugd/8acad3_80f0b560ceb54a798b617be43553485c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/7491088164.pdf
    • https://cdn.shopify.com/s/files/1/0435/2602/9463/files/97516040350.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/bescherelle_la_grammaire_pour_tous_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7974/files/army_of_two_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/apis_mellifera_adansonii.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_off00007c1e.bin
959d51aa8f9e27d0979d80281b7e8310e6905bbd98519b6f43002f8ca3088831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1E 5372 bytes
font_01_sfnt_off00008e84.bin
3c8d19a67dd213c28eebb3b518ad4e9e0f48f96d3d4c202dd60b867c3e07a6d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E84 10156 bytes

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