Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7aaf6c38ba4677…

MALICIOUS

PDF

73.0 KB Created: 2020-08-02 23:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09e0c7c1a01de7f5489361d0fdb5612d SHA-1: 350bccf2d63afb1f20b90e029572d57f77791275 SHA-256: 6f7aaf6c38ba4677ec9c179edd3fac188c387972d2a92d3bf6020e01bc46f513
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=how+to+convert+pdf+to+svg+file'. The document body, though heavily obfuscated, contains text related to file conversion, suggesting a lure. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=how+to+convert+pdf+to+svg+file
    • http://files.midnightbordercollies.com/uploads/1/3/0/7/130775856/e26c766b5.pdf
    • http://files.stjohnsdunellen.org/uploads/1/3/0/7/130775309/wodoriduj.pdf
    • http://files.randallbmusic.com/uploads/1/3/1/3/131381112/41710b9fc0d4177.pdf
    • http://files.baldwinpops.com/uploads/1/3/0/7/130739704/tevit.pdf
    • http://files.honestlycleanllc.com/uploads/1/3/2/7/132740275/959103.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7198/0198/files/seattle_visitors_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/sifoguporewopusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/ziworuvumopafif.pdf
    • https://cdn.shopify.com/s/files/1/0439/9602/0894/files/fapajegesamigi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/vevuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/3058/5250/files/lolumatowajesasabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/lokefemudiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/62538679938.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/tezomupatatowitujiwotig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/11308708449.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/baxakuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6539/3820/files/kobivezesipolugikoj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e208.bin
bdfebe105ca59ee9ad6688d3187b67c4c6a409f860157ac9fca5658fedd438d3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 5228 bytes
font_01_sfnt_off0000f400.bin
1ea0f4ffa5dfb96195b9ec446a8e40ca5471cf482b8524e516b1e3afd2dd7f55
pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 10128 bytes