Malicious PDF — malware analysis report

Static analysis result for SHA-256 a385df04cc7dfd19…

MALICIOUS

PDF

60.9 KB Created: 2020-08-16 18:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f04dcbc5402f5fa8c0d59361171db9 SHA-1: 1102567f7c40140cea2fc44e45ce0c63c2df1f46 SHA-256: a385df04cc7dfd19427e7b4e7475e89f3393547fb7f07ac265226e425dfdd26a
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as information about Android custom ROMs. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL is embedded within the document body and also flagged by heuristics.

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.cc/pify?keyword=cyanogenmod+android+6.+0+marshmallow+custom+rom
    • http://files.ccpdiscoveryschool.com/uploads/1/3/0/7/130775528/a630a59c088cc.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/bebimededaxitukusovo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/69868388893.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/xikomobetakugiselefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/noxakenazumerunelosajuwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6707/0877/files/71809453447.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/22254605401.pdf
    • https://cdn.shopify.com/s/files/1/0433/4924/6110/files/comparative_and_superlative_adjectives_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/bujidadulivuvuwulitojome.pdf
    • https://cdn.shopify.com/s/files/1/0435/1003/8683/files/darkness_reborn_guide.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_off0000abb6.bin
cabd6721bec339f3d413bc30ca78aead25894c918ce326f79642a851d7a1c698		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB6 5780 bytes
font_01_sfnt_off0000bf52.bin
163545308885b1b96e8889fab983bc6ffa5c8ca9ed7e48e1ae7a917db331d4d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF52 11512 bytes

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