Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca649c139c4ec281…

MALICIOUS

PDF

51.3 KB Created: 2020-08-08 01:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97928534ddb9388de41a73af2263a1ef SHA-1: 78203cb92c1e5ba05edaff03b1b90aae8581f7c9 SHA-256: ca649c139c4ec281278dbbaa8be5ab6a4b1597dd188480c19f73a7c3574bfec3
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'calisthenics beginner workout plan pdf' and includes the malicious URL. This suggests the PDF is designed to trick users into clicking the link, leading them to a malicious site. No scripts were extracted, limiting the analysis of further stages.

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/pify?keyword=calisthenics+beginner+workout+plan+pdf
    • http://files.alidonaldson.uk/uploads/1/3/1/4/131437484/noraxunegul_vifuxugofolexu_peboloxukixe_sewisiluzutizin.pdf
    • http://files.miseeiresaratoga.com/uploads/1/3/0/7/130739892/kezarezupole-mumaroxo-fozigekixonefeb.pdf
    • http://files.kiamablowholebuskers.com/uploads/1/3/1/6/131606016/tulawopanobeji.pdf
    • http://files.foodloveblog.com/uploads/1/3/1/3/131380868/vosirijofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/82286378482.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/21677454034.pdf
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/91562738108.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/shanghai_subway_map_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0756/5214/files/causes_of_overweight_and_obesity.pdf
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/articulos_sobre_caries_dental.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/35287099472.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/bukudumifuwogogaxekupigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0437/7821/1991/files/chief_keef_thot_breaker_mixtape.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/43750918246.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.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_off00007aa2.bin
2b8f3825ccc608b7c440e02594480a196826192d6c9d1d6ca0581e329c6288ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 5620 bytes
font_01_sfnt_off00008dba.bin
4110298785fc6a8a8128a16565ac552669c57df152399a9afe86b0f38f8df0f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBA 10456 bytes
font_02_sfnt_off0000b180.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB180 4324 bytes