Malicious PDF — malware analysis report

Static analysis result for SHA-256 4206d6556000b0aa…

MALICIOUS

PDF

47.8 KB Created: 2020-08-04 09:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 968064272ab22e15f15b42abc3d5e2c7 SHA-1: 0498a055b4fb467ec97389a46e435eb5012472c7 SHA-256: 4206d6556000b0aa4d24c43166169acb2d2777844cb3eb929e8fbe86760553d9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link

The PDF file contains a mass of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO spam campaign. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body also contains the URL "https://ttraff.cc/pify?keyword=mit+press+algorithms+pdf", suggesting a lure to trick users into clicking on malicious links under the guise of academic 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=mit+press+algorithms+pdf
    • http://files.janeelizabethstudio.com/uploads/1/3/1/3/131397981/8358516.pdf
    • http://files.amandalevdesign.com/uploads/1/3/1/4/131438539/4486293.pdf
    • http://files.afmsptsa.org/uploads/1/3/2/6/132682564/rikopekelofilolubip.pdf
    • http://files.tepeyacinstitute.com/uploads/1/3/2/6/132681443/zajiw.pdf
    • http://files.hamtramckpestcontrol.com/uploads/1/3/1/4/131453539/wowukum.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/risejikaxugopifakovewikof.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/nakegibivopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/33134197870.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/54514398893.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/lotigorusefojopa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6853/8521/files/vakebog.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/34804896640.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/mixobega.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/tefelunefisuburuzeludogev.pdf
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/kazositobefatejejepa.pdf
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/aadhar_card_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/wojifitasamelo.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_off00007aa3.bin
7dc789f0187496cd5a949d2fd0b6af3f56f4b112a1347ccf7a7c362b52e43d70
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA3 5460 bytes
font_01_sfnt_off00008d12.bin
70221519c3058a941f2a9a23e6029966a1fd47f494c883de1145fb30fefa7fd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 10820 bytes