Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fa9e081abe4ecc…

MALICIOUS

PDF

39.4 KB Created: 2020-08-04 11:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6676317889b87aa5d7d0fedc6e5ce645 SHA-1: 42d5b794c3186557a62196f88bfc6e213d8272d1 SHA-256: 49fa9e081abe4eccc13224a7308d34e8f133dece05ed1e92509cdbc85d13b260
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'social case work pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file also exhibits characteristics of a link farm, attempting to disguise malicious intent within a large number of external links.

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=definition+of+social+case+work+pdf
    • http://files.johnsonswatersolutions.com/uploads/1/3/2/8/132815298/lekenesej.pdf
    • http://files.crossingovercdc.org/uploads/1/3/0/8/130813409/womabi_baziles_vejoti_xakukuguvixefe.pdf
    • http://files.professional-tourguides.com/uploads/1/3/2/7/132710497/817014.pdf
    • http://files.sidleystandup.com/uploads/1/3/2/6/132681295/1034485.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/fukekirozakiwelono.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/86077587846.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/tinilad.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/1319708930.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/kozamemofimi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/afmc_previous_year_question_paper_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/pebit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/nametevupadagogaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/pomelutogirik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.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_off00005cf0.bin
c746291092b29f0a71d176c406420831507cbf5d899d03d5f1028e63559bc64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF0 5304 bytes
font_01_sfnt_off00006f2b.bin
eccabbc4bcd9f000b002d9194be27152e1e270dc953da234322cbcd429e928d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2B 9880 bytes

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