Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42f68fb27c26d19…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 21:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03b20feb6635528646fe63f130c92553 SHA-1: 53e4c0deef5c3bca662ea1cf6224954ac39a850e SHA-256: a42f68fb27c26d195df508599286b44462820fdfb119e8d8615f1e4fac9ba55e
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.club/wix?keyword=lagu+baleganjur+ogoh+ogoh'. This link is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The presence of a large number of external PDF links, many pointing to 'static.usrfiles.com', suggests a link farm used to obscure the malicious destination.

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=lagu+baleganjur+ogoh+ogoh
    • https://static.usrfiles.com/ugd/01e791_b063dcc8456a4119a720d1538f8a8fa8.pdf
    • https://static.usrfiles.com/ugd/726ec9_c4a906763dc84cf688b59c24ebf13af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_feaca2158ed345b5a23ce8cb5d1b11aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_02bf0a0c5ede4583b222c02ded92da3f.pdf
    • https://static.usrfiles.com/ugd/91e123_fb7aa6d807a643a8a0ceb2d5c009fcd9.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/70817144826.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/arcs_and_central_angles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/28403767568.pdf
    • https://cdn.shopify.com/s/files/1/0427/4143/2487/files/saxekorujusojesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/52990112849.pdf
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/hino_owners_manual.pdf
    • https://static.usrfiles.com/ugd/3aee12_8338649be5e0418a98d31bfc91979a66.pdf
    • https://static.usrfiles.com/ugd/20d83a_3c66a35b2cc245a0aa5d6ecf44ad3384.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_off00004939.bin
d9eb4d622b73fa36d96aaba397b1ba26d356bae5d698de2d4b9087d0411639d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4939 4924 bytes
font_01_sfnt_off000059fc.bin
399a40fdbba054fc0b2b89169aef591be1db2e908a3bbdfb74300cb04983dd65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FC 9852 bytes

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