Malicious PDF — malware analysis report

Static analysis result for SHA-256 919f611da9add827…

MALICIOUS

PDF

53.1 KB Created: 2020-08-08 15:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028f5f3c508d9bacbee0cc13aea45e9f SHA-1: 402c0a0a110f13951e21c9d6dae05422987275d2 SHA-256: 919f611da9add827cd9c588f63b3a72a0fa6d0a1c5f001d7c9ea491fb9757841
130 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document also includes a visual call-to-action, suggesting a lure to encourage user interaction with these links. The presence of a link farm indicates a potential attempt to manipulate search engine results or distribute malware through a large number of seemingly benign but ultimately malicious links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=parestesia+fisiopatologia+pdf
    • http://files.glassexpressions.in/uploads/1/3/2/7/132740250/ee7a4edfc0dbdc.pdf
    • http://files.monarchaccountinggroup.com/uploads/1/3/1/6/131636825/2906a68865.pdf
    • http://files.whateverhetellsyou.com/uploads/1/3/1/3/131384424/6818ded.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/vixisanuliwupakuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/63331093505.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/18050000984.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/nuruwulebew.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/malaruxasererinugakasepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/94214000827.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/91367871862.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/komuvakagiverorudu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/law_of_acceleration_example_problem_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0429/8555/4073/files/88832627044.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/9368899543.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/zotanakikalavoxowabalug.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_off0000857d.bin
931d883835e3d9b83eca09d59bd8c9dc8687e5c569e56471030ed05a92a4f6ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x857D 4892 bytes
font_01_sfnt_off00009631.bin
61e78b115d1e8891b514c0fc1cc300aa3e9480ffcb5f2c4c8324304321c6d1fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x9631 10248 bytes
font_02_sfnt_off0000b947.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xB947 4324 bytes