Malicious PDF — malware analysis report

Static analysis result for SHA-256 c950d1ae1ab772ab…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 10:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0e09cb3d51b7ef25995ac9d7e48ec8d SHA-1: 9c212e2769649a57a835c4d5ad56b4b0b705423f SHA-256: c950d1ae1ab772ab417332812c5b6cf16347d8b137faf33eb26de7e8d2591e34
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a job interview lure. The document also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=english+teacher+job+interview+questions+and+answers
    • http://files.tarameyer.com/uploads/1/3/0/7/130740323/datejovoreji_dosoweze_xivumigubem_pabupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5876/files/72661434998.pdf
    • https://cdn.shopify.com/s/files/1/0433/9472/8103/files/e_waste_management_project.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/49053234596.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/tizuzukeputowopeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/aloha_pos_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3492/5463/files/capitalization_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5110/files/is_is_not_analysis_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/personal_project_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0445/7195/1268/files/bigeretu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/19114953951.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/95263748353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/gokolejulumoledasinelapuk.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_off000070f8.bin
3ebbe775120e252a5cae661b5a6191f496fcc2e5919bb508f03f67d5eaa743a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F8 5652 bytes
font_01_sfnt_off0000842d.bin
fd4bab1463db9001aef45591723c2ee4c0901ce110132d7a55cd8ea4e9b76611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x842D 10628 bytes

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