Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1600537f9692c13…

MALICIOUS

PDF

48.1 KB Created: 2020-07-14 10:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fd74dcb888f89051db92488a309f578 SHA-1: 129d651c33e990f0f2339860bd6b9fcf4e050d6e SHA-256: c1600537f9692c13f94ef8bea53c11feed7e3e2a99c7212ebe8aeaa41a134c12
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. The document body, though heavily obfuscated, appears to contain text related to skin disease prevention, likely serving as a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many of which are hosted on WordPress.com. The primary malicious IOC is the redirector URL.

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/wb?keyword=prevencion%20de%20enfermedades%20de%20la%20piel%20pdf
    • http://files.rebeccakallies.com/uploads/1/3/0/7/130775982/gebajujulonoweb.pdf
    • http://files.fearnblastingandpainting.com/uploads/1/3/1/3/131381991/lidivakeso.pdf
    • http://files.the-simple-kitchen.com/uploads/1/3/1/8/131856430/dutazetikomir-gelene-girepofitopefid-sawureledarek.pdf
    • http://files.rebeccakallies.com/uploads/1/3/0/7/130775982
    • https://tojufedeken.files.wordpress.com/2020/06/86099330252.pdf
    • https://volutabeni.files.wordpress.com/2020/06/pojuzuvubixapipomo.pdf
    • https://vupejesos.files.wordpress.com/2020/07/winanubaran.pdf
    • https://bulimogip179696400.files.wordpress.com/2020/07/kutolirapurotoruvibena.pdf
    • https://xuzarirak.files.wordpress.com/2020/07/11561974378.pdf
    • https://japafik.files.wordpress.com/2020/07/gupatabubobemaxosag.pdf
    • https://nowizajigoga.files.wordpress.com/2020/06/24245856060.pdf
    • https://pibokiwadi.files.wordpress.com/2020/07/tozavolumiwamerufebu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/66491986354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/98875507239.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/moleva.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/76031565134.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_off00007c94.bin
69ab403b3c5616cebde43f8e8b36eb2ba0f53a348e0d00e3231ce113ad2eeb28
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 5068 bytes
font_01_sfnt_off00008da7.bin
5161b8aa5151d5813ad1d17cbffb7694ebce30bc107422eb8a92104912a23a15
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA7 10972 bytes