Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61f1ca6772bc86b…

MALICIOUS

PDF

56.8 KB Created: 2020-08-21 09:25:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1429b9347b7f8138897a2f6876c72f0a SHA-1: f7eab3cf4aec2220bbdfb6a319c5e602fe88a25f SHA-256: b61f1ca6772bc86be090e1639687cef38602be5df02936176fd8dabe3b165284
160 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie, which aligns with the malicious redirector's keyword. The presence of a visible LOLBin command execution instruction suggests the PDF is designed to execute further malicious actions, likely initiated by the redirector.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=south+movie+2018+love+story
    • http://files.cripcouture.org/uploads/1/3/1/8/131857758/3329833.pdf
    • http://files.soleistictouch.ca/uploads/1/3/1/4/131453618/5584907.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6473/files/curly_brackets_in_format_string_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/duwisenodokalubaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/17055327660.pdf
    • https://cdn.shopify.com/s/files/1/0433/3810/5000/files/city_domain_cleric.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/bajoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/pradhan_mantri_awas_yojana_list_2020_up.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/26533822031.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/42368996168.pdf
    • https://cdn.shopify.com/s/files/1/0434/1615/8359/files/comparing_similar_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0449/1404/9191/files/vajosatoguluk.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/associativismo_e_cooperativismo_sebrae.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a82.bin
dc7c358bfc373c6ec14587ee019a0a4a9ba0456a60b61b26ba90242612e736f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A82 5500 bytes
font_01_sfnt_off00009d21.bin
280fd1e66f2f4fb58e84856412a872eb57d2590d18e3777f803e70fac7c9adf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D21 10328 bytes
font_02_sfnt_off0000c0ab.bin
18820e64b89489c6901bdbad9637cefc87d81bb55776bf10726fbc7439458c45
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AB 16336 bytes