Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0088bbc51254ee…

MALICIOUS

PDF

41.9 KB Created: 2020-08-02 07:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b093a171f7bb9412adac07f44768a1b SHA-1: 58ecc07a328798039cc6ef0c64876c37adced825 SHA-256: 8e0088bbc51254ee9d11e6343b6909e4a1a4f2e9c9965a4023527008bb8af2ae
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. Additionally, a PDF link farm heuristic indicates the presence of numerous external PDF links, many hosted on Shopify, likely to obscure the malicious redirector. No scripts were extracted, and the document body's content is heavily obfuscated, but the presence of the malicious URL is a strong indicator of a phishing or redirection attack.

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=ap+biology+free+response+2015
    • http://files.incrediblehampi.org/uploads/1/3/1/6/131636990/a091ba9871a35.pdf
    • http://files.hkyours.ca/uploads/1/3/2/3/132303316/87b859c1f97.pdf
    • http://files.texlakegoldens.com/uploads/1/3/0/7/130739919/8c26b.pdf
    • http://files.mockingbirdoakland.com/uploads/1/3/1/1/131164431/kepupoxojipudotew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/botiwumuranakelisog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/96075516931.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/94417191106.pdf
    • https://cdn.shopify.com/s/files/1/0428/9265/6799/files/81238688072.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/86305587392.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/nojop.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/59838615767.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/20930341960.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/97082840249.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/8285406961.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/valewiruvap.pdf
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/21289739997.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c17.bin
801c74c451765f1b2500174c0b6c1fba0cf5fcc0435a2232764e7dda85e31ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C17 5540 bytes
font_01_sfnt_off00005f15.bin
c52681881323e17d4da08423d761b27c030da7ea10732526825eccda8346f3a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 4428 bytes
font_02_sfnt_off00007001.bin
8ae03b6ecaffd87150d26ad3a25760b875572b1fb48c093a21c144ee4da346a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7001 10176 bytes
font_03_sfnt_off000092a2.bin
f4c1951fe63072d871aa5e031b9b131b770368359e1d24a6c84c3267c1ca0576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A2 1748 bytes

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