Malicious PDF — malware analysis report

Static analysis result for SHA-256 b90984b1d87df6d4…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 13:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e5aadf497e75e3941820254ed27693b SHA-1: 14ee1148df8684298dded05a7b93bf645d4d2c9e SHA-256: b90984b1d87df6d400e418cb7609ed3ab19ba4a86bbc2fb52aec5fe51d210d94
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, specifically pointing to 'https://ttraff.cc/pify?keyword=long+train+running+chords'. This URL is presented within the document body, disguised as song chords, to entice users to click. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on cdn.shopify.com. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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.cc/pify?keyword=long+train+running+chords
    • http://files.moralehemp.com/uploads/1/3/1/3/131398221/gofijofiwom-zafov-bojitatazemavig-tubapuvava.pdf
    • http://files.a-la-karte-online.com/uploads/1/3/2/7/132740547/8c986e186.pdf
    • http://files.helbreathng.online/uploads/1/3/0/7/130739831/4414319.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/76906812095.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/mosavedinereni.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/sexumanibafasimefu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/zogabefofiramefowejogez.pdf
    • https://cdn.shopify.com/s/files/1/0437/5733/8776/files/pathfinder_magus_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/34009967168.pdf
    • https://cdn.shopify.com/s/files/1/0435/4739/4199/files/physics_laboratory_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1567/files/45786407115.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/19860552697.pdf
    • https://cdn.shopify.com/s/files/1/0446/7671/0563/files/lightning_arrow_ds3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/segaranodexesupuxete.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623b.bin
5ebf4edda3a8882bbfd1fc5b59b417cb76445fc13e9f84bb60fc87ce6fa1a80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 5108 bytes
font_01_sfnt_off00007398.bin
a03433de3e41edc897750b10eb151cbf091b9a7f0aa07bef33ff3f610bdb92be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7398 14516 bytes

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