Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cff0401761e292…

MALICIOUS

PDF

41.0 KB Created: 2020-08-05 14:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59ffa0bd4fa1b1aab50fd6bfa0a8a052 SHA-1: a732676ec9a58a595bd529a370157c1b10a7cc2e SHA-256: 58cff0401761e29279e3b15906707a12d16ec74e3d798f2dbfe54b55d8a9d849
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, containing numerous external links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=ansi+b16.+5+pdf'. The document body, though heavily obfuscated, also contains this URL and other links hosted on Shopify, suggesting a coordinated effort to distribute malicious content through a network of linked PDFs. No scripts were extracted, and the primary malicious activity appears to be the redirection via embedded links.

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=ansi+b16.+5+pdf
    • http://files.schooltechie.com/uploads/1/3/1/4/131407705/sobewurazugi.pdf
    • http://seliro.atlasandanchortattoo.com/uploads/1/3/1/4/131437044/fuwuvotaf_sawolajuzizizaf_puwoxulikonupu.pdf
    • http://files.deborahjonesdesign.com/uploads/1/3/2/3/132302787/mibamiwusurotameleg.pdf
    • http://files.bonescanoeandcampground.com/uploads/1/3/1/6/131636927/7054615.pdf
    • https://cdn.shopify.com/s/files/1/0437/5432/4117/files/12862115778.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/romuxagiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/git_deploy_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/libro_aura_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2557/files/xefalubinenavefixemoge.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/falewivigukenafikegara.pdf
    • https://cdn.shopify.com/s/files/1/0431/7298/7046/files/30850082750.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/gasipivonekirunewifu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/9999522005.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_off00005b6d.bin
5e0e99087ef2de97dde77efa6362015644279270c91fe118cdcd47af2db270f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6D 5188 bytes
font_01_sfnt_off00006d3f.bin
245867e58d14ee51958b08b6999e74e00e8ae069e007750992be92c7ab2b0970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3F 13600 bytes

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