Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab52574ff90a9714…

MALICIOUS

PDF

45.4 KB Created: 2020-09-08 19:07:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0348058b29b06a4493cdfa08ced3b9a8 SHA-1: b63567800c431499dcf409863850186be4daf879 SHA-256: ab52574ff90a971474f1ec189b7229f13e7c06b29fb029ed7ca502dd05098f06
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=chamara+weerasinghe+audio+album'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0438/5760/8864/files/karizogivudujifofag.pdf'. The ML classifier also strongly indicated maliciousness. The document body appears to be obfuscated or corrupted, but the presence of these links suggests a phishing or redirection attempt.

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/wix?keyword=chamara+weerasinghe+audio+album
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/karizogivudurunudujifofag.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/ravojifoxilusawoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/vufebosudobegusijijazux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/dafipogamaxap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/sajofugefewo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/roxikevinikidugopowomobet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/46406385039.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/fish_physiology_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/cgst_act_2020_cbec.pdf
    • https://cdn.shopify.com/s/files/1/0461/9026/4478/files/desoduxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4277/files/69360113712.pdf
    • https://cdn.shopify.com/s/files/1/0436/9104/9115/files/facebook_live_video_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/79605200985.pdf
    • https://cdn.shopify.com/s/files/1/0431/9464/6688/files/6675186236.pdf
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/cash_flow_diagram_template_excel.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_off00004f3d.bin
168ae87f655848b56548decc12b74ae8a15078f64bfe53baf5cd22e5571e625c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3D 5376 bytes
font_01_sfnt_off00006123.bin
ce65de950438b370f360ff1d162cd413e7632fa6296d0bc5f762f106e8969d46
pdf-font-stream PDF embedded font (sfnt) at offset 0x6123 12212 bytes
font_02_sfnt_off0000860b.bin
b5993a222d4215ef7ea7cb2d81fb20d9c58fde4ea545db9514a0df96440dea53
pdf-font-stream PDF embedded font (sfnt) at offset 0x860B 10184 bytes