Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaefea88a2257c3…

MALICIOUS

PDF

38.4 KB Created: 2020-08-18 13:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 858f995ae0134047b0df989fac409b07 SHA-1: 61275b403a3e412ed6bb015dfc440de8590a77a6 SHA-256: ffaefea88a2257c3b1ad69883ac27e533935774e55980602f04ae3eb0815354a
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, though heavily obfuscated, contains text fragments including the URL and a game title, suggesting a lure for a fake download. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic to distribute the malicious content. The primary malicious IOC is the redirector URL.

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=chicken+invaders+1+full+game
    • http://nevivab.amaddoodler.com/uploads/1/3/2/6/132696212/gafikutikanoputemobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/tecnologas_para_el_cero_defectos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/fotuvejabesakoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/cancer_de_boca_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/zololavulaxufugewanade.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7879/files/complicated_malaria_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/86290488216.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/51935850635.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/amazon_writing_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8357/files/confirmation_email_template_for_interview.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_off00005917.bin
f1cdc6a6b9b66912d2e35be44f54aff711376863c157887120019be9bb0b6f52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5917 5516 bytes
font_01_sfnt_off00006bb1.bin
9544ff0fe96de3c9558ad49ff71837e001cbbcf9158009e9aa59886dfd532573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB1 9884 bytes

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