Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e6aa7def2b6b01…

MALICIOUS

PDF

43.6 KB Created: 2020-08-29 03:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86453442593f20c8a0efb12c4e457ae SHA-1: 89f440b59ccc6b5566bf1b21eb54a9bf44b24537 SHA-256: 75e6aa7def2b6b01ea6a126ba30ba030ed673cf3e0a404c24ce366ad5fa31f29
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a common tactic for SEO poisoning or redirecting users to malicious sites. One of the embedded URLs, 'https://ttraff.cc/wix?keyword=woman+nascar+driver', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/wix?keyword=woman+nascar+driver
    • https://static.usrfiles.com/ugd/b8c837_cbe712cf79044c0db5f095efe17b8408.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f66660d0f484b9eb01b561995ed23bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_3da18023befa43ed9d4ec3fe143e4c6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7e0b3ce968343c2bab98d79d3275bbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ef12abd6e7b45b7a467773c1fd6f4e4.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/bexerobisarusutajezekiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/zagug.pdf
    • https://static.usrfiles.com/ugd/b8c837_073592ebeac649b99be6b569b541cea0.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcb8cec071e747509494258195b98e83.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2e180409194f98bff96c534e57243b.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/62084987282.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5384/files/safesagapopezogefi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9768/5157/files/76369879582.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_off00006e48.bin
d2af84587bcbae1a2e5eed4d0e7a705b0a0307061084694ff418cea40cf66940
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E48 5124 bytes
font_01_sfnt_off00007fa7.bin
cf194a4701faf256338a48f1c97314f32f6c4a93126c67c038dd9404fff929ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA7 10096 bytes