Malicious PDF — malware analysis report

Static analysis result for SHA-256 8453ca57c77e233d…

MALICIOUS

PDF

38.1 KB Created: 2020-08-18 22:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 637891be9d589debac808a84343798b2 SHA-1: 7c590c278c7b67b79dc281ba307cdac40731773a SHA-256: 8453ca57c77e233d46028a7bbc29540ff13fd6537ea491c414491e64e1df8600
120 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.com, which is disguised as a 'Comptia security certification guide'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The document also contains a large number of links to external PDFs, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for the malicious link.

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=comptia+security+certification+guide+ian+neil
    • http://files.waltonroadallotments.com/uploads/1/3/1/6/131607712/lewugikil_manuronizajizem_dopabafifiti.pdf
    • https://cdn.shopify.com/s/files/1/0450/2798/3510/files/student_loan_master_promissory_note.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/4185297157.pdf
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/67198241697.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9631/files/sony_ic_recorder_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/diary_template_for_onenote.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pidepuwavulosetanujerepub.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/jomuzedito.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/savaketogasaveladul.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_off0000569b.bin
f717ea48e89258e9d18236a46ad0dd8631ebfe89d9689ffec5a8d9a0f50f2706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569B 5484 bytes
font_01_sfnt_off0000692e.bin
04a8d61d7d82d5b14e61a384d68c740ff66bb19caed1609884cfba7324cd2675		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692E 10216 bytes

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