Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd901a000958e85…

MALICIOUS

PDF

42.8 KB Created: 2020-08-27 16:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 627cb65a570ce41631257d2e29ec2cda SHA-1: e8fc6eab3c8891a42418f59fdffca3ad8f148cf1 SHA-256: 8fd901a000958e8521763f884209b5b9fdbf3a1448ebdfe476bfa1ef6e6117b4
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, pointing to 'https://ttraff.cc/pify?keyword=procesos+e+hilos'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0430/6799/8359/files/tosigasuwevefubevusesamof.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting the file's purpose is to direct users to potentially harmful external content.

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=procesos+e+hilos
    • http://files.bearlakedental.com/uploads/1/3/2/6/132681342/5864819.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/tosigasuwevefubevusesamof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3039/files/38611329918.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/cheat_engine_6._1.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/pufubaxoludiwisagubifijad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8231/files/94999255921.pdf
    • https://cdn.shopify.com/s/files/1/0433/9403/9975/files/sijipuwukufo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/91426917445.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pezajumukupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/warhammer_40k_8th_edition_datasheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/wimaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/betora.pdf
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/nitro_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/gobunos.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_off0000689b.bin
805470ca9151dafad74b14531014618caba0b14fffafa8044710b642dad81691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 4676 bytes
font_01_sfnt_off00007870.bin
c5d121361fc9e4bb43f9b39fcc40b6e8b5f8a396d1b0bb55d7c01472fba96e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 11416 bytes

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