Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ef7b279b6ab1d2…

MALICIOUS

PDF

44.5 KB Created: 2020-09-01 07:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b810f8a6aabd2f12994be3b69b69d21e SHA-1: 6a3e01b53445d7edabcc9c948c186ce5845af969 SHA-256: 51ef7b279b6ab1d2f473190175e865b58bed0b4b567e6f2f867be4d28ffe0695
136 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=monthly+billing+statement+template+excel', is identified as a malicious redirector. The document also exhibits characteristics of a fake invoice or payment lure, combined with a visual download button, suggesting a social engineering tactic to trick the user into clicking the malicious link. No scripts were extracted, but the presence of a malicious redirector and lure elements strongly indicates a phishing or scam attempt.

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=monthly+billing+statement+template+excel
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/biology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/7569/7830/files/64770804136.pdf
    • https://cdn.shopify.com/s/files/1/0435/4762/3592/files/vowesukomaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/7563071501.pdf
    • https://cdn.shopify.com/s/files/1/0437/8843/5613/files/85710820615.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/25258797388.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/rageneja.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/laboratory_safety_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0434/2988/8161/files/dokumen_amdal_pt_indofood.pdf
    • https://cdn.shopify.com/s/files/1/0444/1423/8887/files/bleach_vs_naruto_apk_2019.pdf
    • https://cdn.shopify.com/s/files/1/0435/5565/1743/files/30821729712.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/telecharger_bescherelle_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7306/0520/files/physical_science_topics_grade_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5005/files/fujixoxokapezarudiketati.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/java_programming_interviews_exposed_download.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_off0000708b.bin
1420d60d1afca3555559ef0c8d061f082ae4e60281d425428e50b8678e11c822
pdf-font-stream PDF embedded font (sfnt) at offset 0x708B 5564 bytes
font_01_sfnt_off0000837c.bin
0c305933ac8c09ea840666f15e048f657da77105ea856d185ced4bebc229345d
pdf-font-stream PDF embedded font (sfnt) at offset 0x837C 9932 bytes