Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec1f0b898b2519b…

MALICIOUS

PDF

50.6 KB Created: 2020-08-10 18:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf85f9102e492885c84989e91de1453 SHA-1: 3b4eaea23b75dffc0a7bf2ce2ffaa6acaaed552f SHA-256: eec1f0b898b2519be7a32e052e8ff5a4e46ec4a768491840e1929a2c96d16f7c
128 Risk Score

Malware Insights

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

The PDF file contains embedded links, with one heuristic specifically identifying a malicious redirector. The document body text, though corrupted, suggests a lure related to a 'promissory note'. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content. The primary malicious IOC is the redirector URL.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=sample+of+promissory+note+pdf
    • http://files.hanzykim.com/uploads/1/3/0/7/130776646/4688292.pdf
    • http://files.mobilecraftbottlingcompany.com/uploads/1/3/2/7/132740511/menotigezewutebar.pdf
    • http://files.bmqg.org/uploads/1/3/0/9/130969695/546635.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1087/files/70516705184.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bafewemuwidizisaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/6336/0153/files/6th_pay_commission_pay_scale_table.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/97718369412.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/17641015302.pdf
    • https://cdn.shopify.com/s/files/1/0450/0701/1998/files/memories_of_midnight.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/ordering_fractions_from_least_to_greatest_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/fiwofegunuxifusoxutigipam.pdf
    • https://cdn.shopify.com/s/files/1/0435/7036/4571/files/73430256557.pdf
    • https://cdn.shopify.com/s/files/1/0435/1361/0392/files/zetotalefejanonevenixad.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/vapozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/kali_linux_full_tutorial_pdf.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_off000086a4.bin
6de81364a3767b7b4c43c6fd118f3ddf81903f15a3e41e9afdc3fae2ef96b319
pdf-font-stream PDF embedded font (sfnt) at offset 0x86A4 5392 bytes
font_01_sfnt_off000098e8.bin
5c5a40f8b0d4a15e65f3936ab9a232b133a53de2d4d677fc20ddfd5b881fa5c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x98E8 10548 bytes