Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b83ab87852b6e92…

MALICIOUS

PDF

40.2 KB Created: 2020-08-12 11:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe4fc01e9915a9b217fcb8bb04963c79 SHA-1: 8bf8d06d9ff53418e95a54b2305bcc60fecfa67e SHA-256: 3b83ab87852b6e92658d48154216dbadeae3682445320f65ec5cf2f3b5e9f701
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=interviewing+skills+training+for+managers+pdf', which is also listed as a suspicious URL. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. This suggests a phishing or scam attempt to redirect users to malicious content.

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=interviewing+skills+training+for+managers+pdf
    • http://xatoso.themilehighmacs.com/uploads/1/3/1/3/131384284/0bd2ad06.pdf
    • http://files.inakadojo.org/uploads/1/3/1/8/131856160/vupeduxa.pdf
    • http://dugix.taaonline.org/uploads/1/3/1/4/131483337/3d436d4560.pdf
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/jebisifizopevurunojewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/nesuximugexiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/mapinalomedowexil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/collateral_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/7519/8373/files/32502293729.pdf
    • https://cdn.shopify.com/s/files/1/0431/8055/6452/files/62296542071.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/bobrick_b_2111.pdf
    • https://cdn.shopify.com/s/files/1/0440/6758/6213/files/bioconversion_technology.pdf
    • https://cdn.shopify.com/s/files/1/0447/7861/9029/files/analise_combinatoria_enem.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7526/files/oktava_mk-_319.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_off00005e55.bin
99e7ef8badca0b1739b0c43469de19f2aefe27b4f9631aec75dfcd0f64c468f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 5516 bytes
font_01_sfnt_off0000711b.bin
c3f9da2a26b398765c04f85d0ba514b4ccaad9504e1f72441f6b892773170ef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711B 10200 bytes

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