Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed73573cc7f9da0…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 19:40:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0341425d9c8237415e4984bd2efd05a SHA-1: 177f63708d5e12e49571062e712855831558da58 SHA-256: 2ed73573cc7f9da0cdd5ac49e106b25c071f2eab1c83db15da9a0cf98b7fcdaf
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'aha acls manual pdf free download' and a URL that matches the malicious redirector. This suggests a phishing or scam attempt to drive traffic to malicious sites under the guise of providing a free manual.

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=aha+acls+manual+pdf+free+download
    • https://static.usrfiles.com/ugd/b8c837_4820d587703c45f1bae3d88223922d31.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5cd7b02488f4d298ef00202ec2908f0.pdf
    • https://static.usrfiles.com/ugd/9c43ec_cbffde4a02b644ac87605888562e0dec.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/98606045760.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/47420052499.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/61971682633.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/list_of_2013_comedy_films.pdf
    • https://cdn.shopify.com/s/files/1/0437/2886/3397/files/razabidato.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3f3980ecb40432683dddd56453d5a04.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf155e1798dc4d58ad38a62e6c9f8df3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2382c9de059f4ac2ac752405039db489.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_off00005c38.bin
3c7f88c80345dc484708735b88ba619b93f77ad25f6ded5c8090e44576ad6efb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C38 5476 bytes
font_01_sfnt_off00006ebb.bin
616ac2f55518eaec74944fc3917ec2df158f9dcb9ab1e5ca0992764cbb64a2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 9956 bytes

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