Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1b61e012f24313a…

MALICIOUS

PDF

43.7 KB Created: 2020-08-03 04:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f9c3cf0dffc9a3c3be1805eb9685ddb SHA-1: 41057a50b87a7f91dc9ec8927fac9c40f3fdbb37 SHA-256: c1b61e012f24313a227b0e86384ff2fbbf5c72b9f598070fe0a908b62af14ba8
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'the fairy-tale detectives' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy, likely to improve search engine ranking or distribute malicious content. No scripts were extracted, but the primary malicious behavior observed is the redirection to a potentially harmful site.

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=the+fairy-+tale+detectives
    • http://files.your-ghost-writer.com/uploads/1/3/1/3/131380052/zajujomizo-wabone-pewejubowixep-jupipixal.pdf
    • http://files.911bodyresq.com/uploads/1/3/0/7/130776118/natarudul-wasawebi-pifag-nisaneneduk.pdf
    • http://files.shoerepairbocaraton.com/uploads/1/3/1/3/131378953/7dab5.pdf
    • http://files.scholasticgrads.com/uploads/1/3/1/6/131606331/06449d29fa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/dizowesanudid.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6617/files/pekovivamolurefamajonab.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6496/files/67815863472.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/93566497630.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/the_thrill_of_the_chase_by_forrest_fenn.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/69266129795.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3829/files/rufusanatonibik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/bimugoxeniwitevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1013/0073/files/26263361998.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/356131385.pdf
    • https://cdn.shopify.com/s/files/1/0438/2746/2301/files/71416150096.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/mortal_kombat_moves.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/tidiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4355/files/rileferubitumapesulinepub.pdf
    • https://cdn.shopify.com/s/files/1/0435/9687/3885/files/breath_of_the_wild_stalnox.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_off00006e58.bin
d4425909a37adf9b9c1cf55c7680faa8e6a6908638abf827be9a2286518e1472
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E58 5252 bytes
font_01_sfnt_off00008044.bin
89cd1ecf1a312d7a7bd73a97a3e1176c6ac6e29f5a90a71987a2a400ea0a4489
pdf-font-stream PDF embedded font (sfnt) at offset 0x8044 9768 bytes