Malicious PDF — malware analysis report

Static analysis result for SHA-256 42df7ad7c0569a2a…

MALICIOUS

PDF

47.2 KB Created: 2020-09-07 08:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a74303e06cf846a600b5cc194dd0e9ee SHA-1: 900332c7af0fb2c9dbdd88183b668cdf09ea6d51 SHA-256: 42df7ad7c0569a2a2515d86d0c88974fff4b6942779bae079109459a00d51f3d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=microsoft+spider+solitaire+free++for+mac'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to 'microsoft spider solitaire free for mac'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious redirector.

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.club/wix?keyword=microsoft+spider+solitaire+free++for+mac
    • https://cdn.shopify.com/s/files/1/0452/5208/3869/files/bitsat_2019_application_form_official_website.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/68487025572.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/99987777769.pdf
    • https://static.usrfiles.com/ugd/432b07_db803203185c479585003144bfa3bc2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e001332d39b4cd69e54935833f64099.pdf
    • https://static.usrfiles.com/ugd/cafc24_6572de9573494fec87c558828d93171d.pdf
    • https://static.usrfiles.com/ugd/a4e402_e790b4bb0cea4d9b9cd8b542b98513e5.pdf
    • https://static.usrfiles.com/ugd/c8a981_b653a6417f94451290fe822121e60876.pdf
    • https://static.usrfiles.com/ugd/cb2bed_58983ea7e8634ba1977b2deaa7c8faec.pdf
    • https://static.usrfiles.com/ugd/c0518c_94578c299bdd4bceaf8afa317420c17a.pdf
    • https://static.usrfiles.com/ugd/de65f7_910f5b55502648948e67dcf92fe9fe8a.pdf
    • https://static.usrfiles.com/ugd/dc98cc_2563def69ab242e1b44b348616125e82.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb184881cb31407da45e654eb608e234.pdf
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/91973820009.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/zafisumofewizamezedawat.pdf
    • https://cdn.shopify.com/s/files/1/0463/4158/7100/files/b._ed_ka_full_form_kya_hai.pdf
    • https://cdn.shopify.com/s/files/1/0437/5992/7448/files/vilimanenagetazakuponex.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8663/files/57488088507.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_off00007798.bin
85cee844451b3974ff87624ecd3689b7464744c5ea47a7e9a0112a992a27a260
pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 5304 bytes
font_01_sfnt_off0000899b.bin
a9a2231fcab53851c25cc4aaa2d813b998bdc8c1e360ebb2758993b95bfbb9bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x899B 12000 bytes