Malicious PDF — malware analysis report

Static analysis result for SHA-256 f813bee5d18fb6ce…

MALICIOUS

PDF

46.6 KB Created: 2020-08-04 19:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d319c7c2674f8fb53328ad974fb84226 SHA-1: 4224ebca804a4a234a48dbed9363ec553ca79015 SHA-256: f813bee5d18fb6cec598b0b65dffdde28fdc5a173397f44aab59bfd4d0b63332
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.ru'. The document body, though partially corrupted, suggests a lure related to a 'Marketing plan pdf 2020'. The presence of a link farm and the ML classifier's high confidence indicate malicious intent. The primary attack vector appears to be directing users to malicious infrastructure via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=marketing+plan+pdf+2020
    • http://files.galesburgrescuemission.org/uploads/1/3/0/8/130874154/af057d1e714.pdf
    • http://files.coastalgeorgiaaudubon.org/uploads/1/3/2/6/132681452/1262732.pdf
    • http://files.parkerart.ca/uploads/1/3/1/4/131453267/wowufiribajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/gezodew.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/shijou_saikyou_no_deshi_kenichi_ova.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/jelakulabugogave.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/48482681384.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/gajuxetemutijoguwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/99682017294.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/88113275164.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/titekumigobarovitone.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/82721866157.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/zonosa.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_off00006e09.bin
505959524cea68b6b33036df5a5308ce6bebc65372b07ff0fb10b3f3f870ed03
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 5052 bytes
font_01_sfnt_off00007f4d.bin
cdd3f35a562d82389486e3b566ff8e683969a201d1b16170c49c385d60c3aa67
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4D 9588 bytes
font_02_sfnt_off00009ffa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFA 4324 bytes