Malicious PDF — malware analysis report

Static analysis result for SHA-256 4519c7836f9d1875…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 04:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffbcd013d2f5175849f20f3d8941a849 SHA-1: 9fdf0ceca6a20ed2c076619d035bbd2dd4496822 SHA-256: 4519c7836f9d1875bf459182a27e83b5a5b0437072d1fda0b5cdcba581df0a80
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=trust+deed+template+south+africa'. This indicates a social engineering attempt to trick the user into visiting a malicious site. The document body, though heavily obfuscated, also contains the same URL, reinforcing the lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to obscure the true destination.

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=trust+deed+template+south+africa
    • http://relaxow.myowild.com/uploads/1/3/0/8/130814328/ferixetidawo.pdf
    • http://files.weeblackbook.info/uploads/1/3/1/4/131409210/dd42e9c0752.pdf
    • http://files.perinatalstemcells.com/uploads/1/3/2/7/132740480/gabefodirinali.pdf
    • http://files.mrmsworkshop.com/uploads/1/3/0/8/130814279/ad69b.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/cadena_de_valor_en_salud.pdf
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/57498035420.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/22529753210.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/chrome_extension_crx_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/61593634354.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/berrigan_races_form_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/adobe_acrobat_reader_full_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/8918/2376/files/35843810283.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/46927510549.pdf
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/95067841012.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0012/files/vaid_sir_anthropology_printed_notes.pdf
    • https://cdn.shopify.com/s/files/1/0465/4704/2462/files/adafruit_amg8833_datasheet.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_off00005f80.bin
1bd5d24d3e9f9849a64513b11b91f7dca1453dd260a67669c21dcd2b84268381
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F80 5344 bytes
font_01_sfnt_off00007182.bin
14c8c8d3dead25526a0f19133026618e63b8e451212b59b636b058a2714c23a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 10744 bytes