Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c31ff5b32292d5…

MALICIOUS

PDF

46.2 KB Created: 2020-08-13 22:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d5a7dd0d975471bd3d695a4af885bd6 SHA-1: 38f6fd7803c7e1670ea4ceeb5cdc203f8a726e55 SHA-256: 31c31ff5b32292d5500411954aa04615fcad735f446eefc5dd58e9f790442443
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to appear as a download for 'Big little farmer apk mod free'. This link directs to a malicious redirector at ttraff.com, which is likely intended to lead the user to a malicious site or download. The document's structure and embedded links suggest a social engineering tactic to trick users into clicking the malicious URL.

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/pify?keyword=big+little+farmer+apk+mod+free
    • http://files.nwadventureguides.com/uploads/1/3/1/4/131408465/siwufux_tedufiduwe_dofesixak.pdf
    • http://tizafu.wildchildfreeschool.org/uploads/1/3/2/7/132712413/luburagoramutu.pdf
    • http://files.cdebtherapy.com/uploads/1/3/2/7/132712369/vazedazelaxope-didisof.pdf
    • http://files.sunshinefamilyhealthcare.com/uploads/1/3/1/8/131857115/7285241.pdf
    • http://wotol.margarettellis.com/uploads/1/3/1/3/131398140/zidomukuputuxizuwe.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/dipajimanivupogi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/luzebezemubokav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/10021944250.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/tokotatulokanividaxexidos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/tadikidumuferezonelepew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/trends_in_higher_education.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/71181859668.pdf
    • https://cdn.shopify.com/s/files/1/0431/9484/3298/files/kivewubimaxuzibisaluxopu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/luwojup.pdf
    • https://cdn.shopify.com/s/files/1/0434/9489/9864/files/xemaxubesowobewig.pdf
    • https://cdn.shopify.com/s/files/1/0450/1137/0148/files/dekenik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000610f.bin
9259c21bbd39b3dadb319c95fed987fff84fe83bc8cff1c0fa19b7fefd1e711c
pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 5296 bytes
font_01_sfnt_off000072fc.bin
18b697964c6acb4614fca9ac5d345ba6533e48cb18b7ec5a0f8d567ec2620942
pdf-font-stream PDF embedded font (sfnt) at offset 0x72FC 10260 bytes
font_02_sfnt_off00009651.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x9651 16164 bytes