Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2842154eb5f5025…

MALICIOUS

PDF

38.8 KB Created: 2020-08-12 02:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8596e8acde1aa394856158997ffc34ef SHA-1: 3de18f2720b2519b6ce884bc39ab5e9eb9c6bbd0 SHA-256: c2842154eb5f50250f51b772d97c8ce6a695f4e912a8a4a14986d8dc9612bd9d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a study guide, which is likely a lure. The PDF also contains a large number of embedded links, many pointing to shopify.com, but the primary malicious indicator is the redirector URL. No scripts were extracted from this sample.

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.ru/pify?keyword=barron+s+ap+calculus+flash+cards+pdf
    • http://files.trilogystem.com/uploads/1/3/0/9/130969179/teligitikoforu-zigefepigor.pdf
    • http://files.titopools.com/uploads/1/3/0/9/130969967/8618654.pdf
    • http://pakevuso.algaeu.com/uploads/1/3/0/8/130814328/7622757.pdf
    • http://files.finnmarkexpedition.co.uk/uploads/1/3/1/6/131606467/1732778.pdf
    • http://mozumedi.parkscapital.com/uploads/1/3/2/6/132682883/2287337.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/foundations_of_engineering_acoustics_fahy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/29750367815.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/20861186101.pdf
    • https://cdn.shopify.com/s/files/1/0452/5621/2642/files/all_length_conversion_table.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/norudoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/download_access_database_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/pefujumovukilataw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/microbial_genetics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/68587145551.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/39165004918.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/dagirovene.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_off00004d0a.bin
9d1ce3d83c0c4480bee768aa0c8bb3781a79bacbb5a1a2b8d3fc6a7499aa5a1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0A 4928 bytes
font_01_sfnt_off00005dae.bin
fb78a6652339a8a8b7dbd773ecf1def95776e618ff52fcf3cdc99401c9c4d458
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAE 10048 bytes
font_02_sfnt_off00008023.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8023 4324 bytes