Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeec3abaf01e6654…

MALICIOUS

PDF

67.4 KB Created: 2020-08-12 18:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66bc01a64a6a4e8961dc631752b31837 SHA-1: 07dc62d580e25035cc32a0b78a6be47246365684 SHA-256: aeec3abaf01e6654ac9d3d23c958ae45f8da0c999b9402b2fd554b384fda1821
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to a 'bachelor thesis computer science pdf'. This heuristic, combined with the presence of numerous other links to external PDFs hosted on Shopify, indicates a link farm or redirection attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. 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.cc/pify?keyword=bachelor+thesis+computer+science+pdf
    • http://gerugidib.springfieldfrontiers.org/uploads/1/3/1/4/131482976/6319942.pdf
    • http://files.paladin.care/uploads/1/3/0/7/130775518/takilijodu_pokolidu_vubudu.pdf
    • http://files.naturalpurposebysandy.com/uploads/1/3/2/8/132814343/9690364.pdf
    • http://files.hillcountrymarines.org/uploads/1/3/1/4/131483344/zonaralu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/99505497988.pdf
    • https://cdn.shopify.com/s/files/1/0447/9533/0717/files/eastern_shore_craigslist.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/28449964102.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0434/8605/2518/files/18047993481.pdf
    • https://cdn.shopify.com/s/files/1/0432/6755/5481/files/nawokuvidowave.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/mifuvekolorutiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9563/files/tusulotefivufunu.pdf
    • https://cdn.shopify.com/s/files/1/0451/7996/1495/files/julelisimovitije.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/73959585937.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/canon_powershot_sx720_hs_manual.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_off0000ca1d.bin
ec2fe6350f4d06a6071b600df22dc0127f8be6dca29222359d068801701d6645		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1D 5444 bytes
font_01_sfnt_off0000dc75.bin
f6451d64775445b113b34fd1edb0fe80bae6b07741669b4ca111254162e7b18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 10504 bytes

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