Malicious PDF — malware analysis report

Static analysis result for SHA-256 de15f5fb95fa8daa…

MALICIOUS

PDF

45.8 KB Created: 2020-08-18 16:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2b355b810745cbddaef05e2b78bc74b SHA-1: cfadaf0c009fea72ac4d3e186d3a18ab5fb9dfb5 SHA-256: de15f5fb95fa8daa0953988c5854e97e8e1dfb4095c08dc36c573b848725627d
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to benign Shopify URLs, but one critical link redirects to the known malicious domain ttraff.ru. This indicates a social engineering attempt to lure the user to a malicious site, likely for further exploitation or credential harvesting. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=westworld+main+theme+sheet+music
    • http://files.rehobothchildrenstheatre.org/uploads/1/3/0/8/130814931/gawosojepadulo.pdf
    • http://mupaxuvo.mrgilladvice.com/uploads/1/3/1/0/131070627/tezazepepedaf.pdf
    • http://files.tinablanck.com/uploads/1/3/1/4/131407423/90778.pdf
    • http://jojuvoben.smallbatchq.com/uploads/1/3/0/7/130776228/2002286.pdf
    • http://files.melissayvonnephotography.com/uploads/1/3/0/7/130775033/weninu.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/the_hunter_s_prayer_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/google_sheets_duplicate_row.pdf
    • https://cdn.shopify.com/s/files/1/0450/7539/8821/files/apprendre_l_anglais_facilement_et_rapidement.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/ropirezetusuzemaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/10842737123.pdf
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/dolikesudufu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9818/3582/files/zigebajipuvaretizekisubox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/invasive_aspergillosis_guidelines_idsa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5165/4047/files/simplifying_algebraic_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/44185638257.pdf
    • https://cdn.shopify.com/s/files/1/0429/4334/8892/files/xomanazijisorejizolenuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rojifibopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/disewuselijozeguw.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_off00006820.bin
c52dbe1d94b2138d65edf4ba500704633ee2bb60c30720eba66d34bc517ceb96
pdf-font-stream PDF embedded font (sfnt) at offset 0x6820 5284 bytes
font_01_sfnt_off000079fb.bin
bf770d10e6c77740ed14edef7652f226914e0aca6c0ba98aa7dbb40769987acd
pdf-font-stream PDF embedded font (sfnt) at offset 0x79FB 14540 bytes