Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab45cd7efcb4d8da…

MALICIOUS

PDF

46.4 KB Created: 2020-08-18 18:53:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cf37ea39ffdb6ae93af7e78ee1fe6c7 SHA-1: 0667c97af0f82aec891cba32f68c420de6c47c7f SHA-256: ab45cd7efcb4d8daeb2f53e904314e50c92232e75a8daf6be93ed2385de529fc
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link and a link farm. The embedded URL points to a redirector that uses a keyword related to downloading software, suggesting a lure. The document body, though heavily obfuscated, contains the same URL and keywords, reinforcing the social engineering attempt. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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=media+player+classic+codec+pack+apk
    • http://files.scholarsmartialarts.com/uploads/1/3/2/6/132680986/9ec373bcfaf06c3.pdf
    • http://sepas.mattmediainc.com/uploads/1/3/1/4/131453896/d82c43d9e0.pdf
    • http://kukovi.houseofhempobx.com/uploads/1/3/0/8/130874276/zujikizorilejatag.pdf
    • http://pojoxega.redhawkinvestmentgroup.com/uploads/1/3/1/4/131409474/d2db223.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5281/files/c_guessing_game.pdf
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/22095129043.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8005/files/68622170166.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/41254019079.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4095/files/jiritemisiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/83696482080.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/30993239151.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/47657528640.pdf
    • https://cdn.shopify.com/s/files/1/0435/3540/1111/files/use_of_audio_visual_aids_in_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0430/2287/6826/files/allahabad_high_court_judgement_on_ram_janmabhoomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/thescript_nothing_lyrics.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_off00007740.bin
b03e7ef21d22d51ae0299019ac76771647f4ae627facc26525dcaa89831e5012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 5236 bytes
font_01_sfnt_off00008926.bin
d31e9344536dde2348020fa775e8827e957e37bb31ce7afc51feea03549baf08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8926 10280 bytes

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