Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d98e8f12242eaeb…

MALICIOUS

PDF

46.7 KB Created: 2020-08-14 03:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 950f256d3581328568ded03fd3683377 SHA-1: 0a916ff0f3597874d0fc8fa485bed178f541cdfb SHA-256: 3d98e8f12242eaeb2cd4a5cf0da303a2d45f126e53ac0b614caf722f4b296e0a
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains a link to a redirector, ttraff.cc, which is flagged as malicious. The document also contains a lure to copy/paste content into a command shell, suggesting an attempt to trick the user into executing commands. The presence of a large number of embedded PDF links, many pointing to Shopify domains, indicates a link farm SEO tactic to improve search engine ranking for the malicious download lure. The primary malicious IOC is the redirector URL.

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cinema+4d+r20+free++mac
    • http://files.dragonflygifts.org/uploads/1/3/1/4/131438490/fukideroranak.pdf
    • http://files.becomingsarh.com/uploads/1/3/0/7/130739567/3400932.pdf
    • http://worar.highhillproductions.com/uploads/1/3/1/4/131408024/wekeleviwe.pdf
    • http://files.store.wssbadminton.com/uploads/1/3/0/8/130814666/6057121.pdf
    • http://files.caseworkproductions.com/uploads/1/3/2/6/132681985/d329a38b55.pdf
    • https://cdn.shopify.com/s/files/1/0433/8650/3324/files/ginagakuvusafubatogid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/57095021252.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/wordly_wise_3000_book_10_lesson_1_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7010/3452/files/jagoxejikabiditugolotikiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/alignment_telescope.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/bestiary_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/1369/1799/files/keridenakapofepifu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/mee6_delete_messages.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/basic_english_grammar_book_5_saddleback.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdf
    • https://cdn.shopify.com/s/files/1/0437/1621/4936/files/anaerobic_digestion_process_steps.pdf
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/tabajojefowaruv.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_off00007148.bin
99fbbe429350852fd3f627b4d1bec893f4845ef66af26fedc419f286f6923f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7148 5224 bytes
font_01_sfnt_off000082f2.bin
f34842126ec6c62d4941cbeefeda43353995d44951752a4a604e8c7248b37a34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F2 13812 bytes

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