Malicious PDF — malware analysis report

Static analysis result for SHA-256 4662234d79ff4c98…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 12:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85b60578f01ed69d65dafd33cdae1dd0 SHA-1: ad91d103afd83cc60be7d44dbe3ab180b9713fd2 SHA-256: 4662234d79ff4c9882aa33f54cafa5f4f7c50949a37015b3f3017eef55972ad6
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common technique for SEO poisoning or directing users to malicious sites. One of the primary links, 'https://ttraff.cc/pify?keyword=aspergillus+parasiticus+pdf', points to known malicious redirector infrastructure. The document body is heavily obfuscated but contains references to the embedded URLs, reinforcing the malicious intent. No scripts were extracted from this sample.

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=aspergillus+parasiticus+pdf
    • http://files.tonymeers.com/uploads/1/3/0/7/130775431/03d7d4e.pdf
    • http://files.rainbowsfirstaddition.com/uploads/1/3/0/8/130814926/rikoxifome.pdf
    • http://files.relaxwellpod.net/uploads/1/3/0/7/130739616/desukonexex-tojajugajeludal-wapet-febuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/83517326818.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/anteversion_de_la_pelvis.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/affordances_gibson.pdf
    • https://cdn.shopify.com/s/files/1/0436/4835/2406/files/dirikebufotuwiludujaza.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/ludzie_bezdomni_lektura_z_opracowaniem.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/ganavopawuri.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/bourne_identity_movie_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/wovewozegejupodupon.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/random_four_digit_number.pdf
    • https://cdn.shopify.com/s/files/1/0428/8253/1481/files/17298266948.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/23941449825.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/46631771585.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_off00006a95.bin
67d952de1f1f099a6096d7154be88de9dcabbbbfff40026b910434689e27f049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A95 5312 bytes
font_01_sfnt_off00007cb8.bin
2093f7165be8ec42f76019006236ef0d36e8a6aefe6e2ee90f6058260e4ed9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 10092 bytes

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