Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc49b527d6a1a387…

MALICIOUS

PDF

36.7 KB Created: 2020-08-09 02:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7c39f6264825ffc7ba4e45bcf3b6fa8 SHA-1: 2c1a500987e5d91a9162b1193386a95da9c35f8f SHA-256: dc49b527d6a1a387fe3bab7b64b1d637089d80f31afd5e0acf174bfb0cc528da
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body and embedded links suggest a lure related to 'incomplete abortion' to entice users to click on malicious URLs. The primary malicious URL identified is https://ttraff.cc/pify?keyword=incomplete+abortion+pdf, which is likely used to redirect to further malicious content. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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=incomplete+abortion+pdf
    • http://dududo.texaspoliticaljobs.com/uploads/1/3/0/7/130775735/bowanubatedude.pdf
    • http://ganotot.grenierconservation.com/uploads/1/3/1/6/131637814/vomawilizeku-vixabadodox-felusoma.pdf
    • http://files.danatanasa.com/uploads/1/3/1/6/131637016/2683820.pdf
    • http://files.professorpricklethorn.com/uploads/1/3/1/3/131379801/1598413.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/khng_m_c_file_trong_outlook.pdf
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/63070077109.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/net_design_patterns_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/51429487201.pdf
    • https://cdn.shopify.com/s/files/1/0437/7244/4823/files/pazamedufesum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/45463197179.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/oscar_niemeyer_works.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/bujibezajotorume.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/84945170312.pdf
    • https://cdn.shopify.com/s/files/1/0434/2317/0710/files/install_wine_mac.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_off000051de.bin
19d1c3fa02d5deeee58efe223b6e33bb1ca0c4bdb66498e40eff19a0b231ff2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51DE 5200 bytes
font_01_sfnt_off0000636d.bin
f36c502eac33d7dc5606cf4f162bdf3bf48dac29771ecf5b211b3287c51f1d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 10424 bytes

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