Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea4d243abe71943…

MALICIOUS

PDF

35.7 KB Created: 2020-08-08 09:20:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862e75584eaf67385c57b5a89fc5c33a SHA-1: d8611dd0e722dc1d735310d980e042dd98a1aafc SHA-256: aea4d243abe719438d1fe43fa79265c33c461c7aff46cf860b12362be630944a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically disguised as a "bioassay textbook pdf". The embedded document body also contains this lure text and the malicious URL. The primary malicious URL is https://ttraff.com/pify?keyword=bioassay+textbook+pdf, which is likely used to redirect the user to further malicious content. The PDF also contains a large number of other links, many hosted on shopify.com, which is flagged as a link farm.

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=bioassay+textbook+pdf
    • http://files.pawsablyhome.com/uploads/1/3/1/4/131407692/kobowemarozopivo.pdf
    • http://sakesaj.fairytalejourneysbyalanna.com/uploads/1/3/1/6/131637814/3294612.pdf
    • http://files.xavieramos.com/uploads/1/3/1/4/131407042/dugajifagozup_pusadizilusa_kiwadomisiner.pdf
    • http://files.ravenclimbing.com/uploads/1/3/0/9/130969297/vukumusisinam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdf
    • https://cdn.shopify.com/s/files/1/0437/3757/9674/files/athlean_x_leg_workout.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/95157401365.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/99571477065.pdf
    • https://cdn.shopify.com/s/files/1/0431/7387/1767/files/ja_finance_park_student_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/effects_of_air_pollution_on_health.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/74608908234.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/cahier_de_charge_fonctionnel_informatique.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/brand_image_vs_brand_identity.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/47586586649.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_off00004cf7.bin
e454eea9a31310c995da8606ad03ea32b2cf8e1ac0504e33fd9c50e9ecc5da28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF7 5328 bytes
font_01_sfnt_off00005f3c.bin
f9268ffcdefd60265ab10adf4f164c6bf429935a47248afb0c80f188a2c71218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 10284 bytes

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