Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7238ed875d5d7a…

MALICIOUS

PDF

52.8 KB Created: 2020-08-05 07:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8194a4acb7172154d838f38197dd1392 SHA-1: 1d24a8615afdcc4fbaee3d2d24475180cb71d536 SHA-256: bb7238ed875d5d7a82c265b734afbee6be0703f3d586f4e35a863df58899284f
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=cat+5e+wiring+diagram+pdf'. This URL is designed to lure users into clicking on it by disguising itself as a search result for a wiring diagram. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The file also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a broader campaign to distribute malicious 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.ru/pify?keyword=cat+5e+wiring+diagram+pdf
    • http://files.kbkornhole.com/uploads/1/3/1/4/131438891/zawavapavukeped.pdf
    • http://vozudepe.thebottomdrawerantiques.com/uploads/1/3/2/6/132681556/4459570.pdf
    • http://files.roustabout-theater.org/uploads/1/3/2/8/132814048/xuwugeredofaj.pdf
    • http://zogado.navarrepenthouse.com/uploads/1/3/0/7/130738714/pepovigekonivof.pdf
    • http://files.catherinereilly.com/uploads/1/3/1/4/131483138/3803139.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/56560230339.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/posapuraledimazixowapam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/43647749936.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/minecraft_forge_1._13_release_date.pdf
    • https://cdn.shopify.com/s/files/1/0429/5055/7855/files/82557666419.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/jusajawezadutebejamas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/62618053852.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/60700934820.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7957/files/88817279788.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/bolly_songs_2016.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_off00008323.bin
f77b5c383cbd2c495d523c313e0e14d7b7f0fc1a0c581f32bfffad0c4d572a1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8323 5068 bytes
font_01_sfnt_off0000945e.bin
f88ea552fa4873368c467e801a4c7532abf748726f38d81eca6e00355e89ef59
pdf-font-stream PDF embedded font (sfnt) at offset 0x945E 10368 bytes
font_02_sfnt_off0000b785.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB785 4324 bytes