Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff41f265b1df53b…

MALICIOUS

PDF

46.8 KB Created: 2020-08-17 09:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 083b81c8674492092ed9fe5624281aa2 SHA-1: e42fc7f56e7fc990b30715647b8cfeae79d839db SHA-256: fff41f265b1df53bfeb685334e58195d6851fdf0ad87e6ce540bd37ce8fdae73
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Malaria parasite atlas pdf' and the malicious URL, suggesting a lure. The PDF also exhibits a link farm behavior, with numerous links to external PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=malaria+parasite+atlas+pdf
    • http://lodaf.butterfliesofcuba.com/uploads/1/3/1/6/131607600/89ac922.pdf
    • http://files.mathzaptutoring.com/uploads/1/3/0/9/130969942/nivevalarorexebelu.pdf
    • http://wokupu.suggsworldonline.com/uploads/1/3/1/4/131406437/pigitozukoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/31432033764.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/21076102464.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/42318606925.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/443023690.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/popujamupiruvawarefubi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7936/6811/files/cantares_mexicanos.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/dafofewexexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/gunasibise.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigazisamakolomomabixefox.pdf
    • https://cdn.shopify.com/s/files/1/0429/7631/3503/files/video_from_facebook_add_on_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1105/files/88232795298.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d12.bin
a31c00b2276a0aaee88350ae62311b4b6811b79b7f67ee45103b8662f05e7de7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D12 4612 bytes
font_01_sfnt_off00007cca.bin
d69e00ac1398b4f449f13cc7cf2ab1b9353a214a8e4d976cc173b3b4bb6e4667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCA 10632 bytes
font_02_sfnt_off0000a0a5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A5 4324 bytes

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