Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3ae0984551e167…

MALICIOUS

PDF

37.1 KB Created: 2020-08-13 17:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c9084737cfbf3146f855c32c9b30a7 SHA-1: ccf60b853a3d45528bd713f93dff8e3117842c02 SHA-256: ca3ae0984551e167ebec89bf060e77dd5b7ac3c4e0d5e3195f7bebf8b7782845
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external sites. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.com/wb?keyword=principles%20of%20naval%20architecture%20stability%20and%20strength%20pdf`. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm designed to lure users to malicious sites.

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.com/wb?keyword=principles%20of%20naval%20architecture%20stability%20and%20strength%20pdf
    • http://saxatos.game4myanmar.com/uploads/1/3/0/7/130739561/275048.pdf
    • http://mosig.gaeunkim.com/uploads/1/3/1/4/131437987/renod-gejajubu-baforegeda-gugaratexebij.pdf
    • http://tesomik.chaddertontogether.co.uk/uploads/1/3/1/4/131453133/fatapadajuz.pdf
    • http://files.holytrinityholmfirth.org.uk/uploads/1/3/0/8/130874474/tujomagu.pdf
    • http://files.justinbendell.com/uploads/1/3/0/7/130775730/ece9c396f567.pdf
    • https://cdn.shopify.com/s/files/1/0430/5800/4117/files/90659053438.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/63945012903.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakuxosisubesabemobaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/ridabubuworusaserasa.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/99028257419.pdf
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/gofaxopini.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/litaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/placenta_previa_williams.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/pikolixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4801/8855/files/wiladewokex.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/kuzanemepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/kejotobujube.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/learn_english_basic_sentences.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048b6.bin
1aaf88cad8ff418b1ae9d966a29a125ffa37e467db9dc67f518df00a36e6f835
pdf-font-stream PDF embedded font (sfnt) at offset 0x48B6 5604 bytes
font_01_sfnt_off00005bb1.bin
d532b5fd8594267428c6397097a67d8f816c2113874bb0c7c587a2500bb2a0e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB1 8612 bytes
font_02_sfnt_off000078d4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 4324 bytes