Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61602badaac97fb…

MALICIOUS

PDF

46.3 KB Created: 2020-08-25 05:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3ba8318293fcde24daad6e22697c788 SHA-1: 6a7cbd7b67f83cdbb59906836c18867dff68541a SHA-256: d61602badaac97fb67d6f507fa1a3944e4e645e11aa1f8aded7eac19cc06db01
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body contains obfuscated text and a prominent URL pointing to a redirector. The presence of numerous external links, many hosted on Shopify, suggests an attempt to distribute content or lure users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=mens+size+guide+uk+to+us
    • http://files.millpro.org/uploads/1/3/0/7/130776676/8a2ebf.pdf
    • http://fesaxej.zionhillcentralia.org/uploads/1/3/1/3/131382081/27cc91bee059.pdf
    • http://fofiwo.mymodernsolutions.ca/uploads/1/3/1/4/131438500/1206732.pdf
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/13419854118.pdf
    • https://cdn.shopify.com/s/files/1/0430/0052/9049/files/zugenav.pdf
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/petufefe.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/atomic_data_types_in_r.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9945/files/marisebimeloxuba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/25221633857.pdf
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/agenda_2020_para_el_desarrollo_sostenible_onu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/vaganisodeposogu.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_off00005bfd.bin
1bff57a972e9b6a04d39b39f0faf1c5e7e4bb69806e5d3ba3d008082f1e76c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFD 4656 bytes
font_01_sfnt_off00006bf7.bin
5346375e1d049ef20cca13904d08e707d34117093a1d5cfc089f115657dfd3cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF7 15936 bytes
font_02_sfnt_off00009ca9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA9 4324 bytes

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