Malicious PDF — malware analysis report

Static analysis result for SHA-256 871271e002391c8d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 12:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00408682dd304ee2d5675ef896656954 SHA-1: f8caa9b0669afeec8bdb9126f69784d625ccce32 SHA-256: 871271e002391c8db6ce50925a308942247143d8fc23f82a880838008ffdf29f
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a link farm designed to lure users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=m%25E1%25BA%25B9+k%25E1%25BA%25BF+%25C4%2591o%25E1%25BA%25A1n+k%25E1%25BA%25BFt+jan+dara+the+finale+%25282013%2529
    • https://static.usrfiles.com/ugd/b8c837_b9dcbb7440464f94805d8184ef6f772f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee9db509fe3b41b8b98ae1688667e26e.pdf
    • https://static.usrfiles.com/ugd/078c79_eb46f264d0d1418cb7fa8ed93c86b4a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f57224e68724d1e9728378571be4fcc.pdf
    • https://static.usrfiles.com/ugd/0df15e_97039d47e4ab40c2a24d7e1e58c1113f.pdf
    • https://cdn.shopify.com/s/files/1/0433/7532/9441/files/vw_type_4.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/super_mario_bro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/ranoput.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7879/files/low_back_stretches_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/12828470311.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/fusesunetodojagakofekokot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1235/7270/files/best_smoothie_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/76817519434.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/28285029738.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_off00005b4c.bin
5ef87fb0489ce964bd12b86533308e6507e93456c8135dbb41dc020dd192ca28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4C 6296 bytes
font_01_sfnt_off00006fa3.bin
3478a1abda95d1687af4f8d838d9bfdbec886f8cba3456cae96bcbee9ae411b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 15808 bytes

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