Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3cb657f61e3a09…

MALICIOUS

PDF

42.6 KB Created: 2020-08-02 10:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58360cfc2ddbb02e06a6a8e6eeb35bfa SHA-1: aeb7b20ae9bb38d59500b1806194d54fdb49c876 SHA-256: 8c3cb657f61e3a09cb0e84a1cd8530fa0c9e995213e7ca06b7b52e715b0a42d2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body text appears to be a garbled representation of a search query and tool name, likely intended to mask the malicious nature of the links. The presence of numerous links, including one pointing to a malicious redirector, suggests an attempt to drive traffic to malicious sites.

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.ru/pify?keyword=remove+commas+from+string+python
    • http://files.rochesterpedalride.com/uploads/1/3/0/8/130814644/2212918.pdf
    • http://files.tom-lane.com/uploads/1/3/0/8/130813736/bawapuxe.pdf
    • http://files.stagingbynikki.com/uploads/1/3/2/7/132712163/768017.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/25232260037.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/vosileruxevofaxaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/rujam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/81461071174.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9309/files/20371615663.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/92745117190.pdf
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/88430856266.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0072/files/66174994144.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/93827650216.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/dakelalas.pdf
    • https://cdn.shopify.com/s/files/1/0434/8719/9394/files/tetununokoguxamo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/vafapuwajexisatukewita.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/tivenubawonutisuxejelavi.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_off000058e5.bin
1e55a4e35ac2c5262e0ceee82ff0b5070e3f006b8da5d82049196710e4948494
pdf-font-stream PDF embedded font (sfnt) at offset 0x58E5 5352 bytes
font_01_sfnt_off00006af6.bin
f0cb3d939ac12ae8040b1057cc13917a9881d4f401837528c3cae39da18818a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF6 10620 bytes
font_02_sfnt_off00008f44.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F44 4324 bytes