Malicious PDF — malware analysis report

Static analysis result for SHA-256 256c4190751c7b75…

MALICIOUS

PDF

48.8 KB Created: 2020-08-31 23:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 591a847cfbfa71b5efd71a8295ec5b4a SHA-1: 7b3a0077f9e8d1e080a2e6025e1281b958a09a6f SHA-256: 256c4190751c7b75abba2034a205fbcdc2e3c07a143f76c0bcbbeb1a8534a2a2
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'brother birthday status' and embeds numerous links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure via the URL https://ttraff.com/wix?keyword=brother+birthday+status. Another heuristic identified a large number of external PDF links, with the first being https://cdn.shopify.com/s/files/1/0434/8978/8070/files/sownictwo_biznesowe_angielski.pdf, suggesting a link farm or SEO poisoning tactic 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.com/wix?keyword=brother+birthday+status
    • https://cdn.shopify.com/s/files/1/0434/8978/8070/files/sownictwo_biznesowe_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/kerogu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/84837309891.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/bebarofuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/puruxujamosala.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/2765935762.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/52500685176.pdf
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/crime_scene_photos_gore.pdf
    • https://static.usrfiles.com/ugd/696117_5488c2db22204788ba5e362e262f9ec9.pdf
    • https://static.usrfiles.com/ugd/b8c837_65753c6de48c4181ab587ea8a8e608a2.pdf
    • https://static.usrfiles.com/ugd/0047a4_3ebb44dde70e474da95258a8e1d87d9a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_36819f8329934cab8fa14e1e2cff10e6.pdf
    • https://static.usrfiles.com/ugd/6f58fb_60b7936001cf44e8871b68cfa7813b94.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/que_es_contexto_cultural.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/63434696822.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/wuwofetelovapovo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063af.bin
bdf7f99717061f1262aa45c5b27a49045b051f05982865ead4f116aedd6d24d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 5172 bytes
font_01_sfnt_off00007533.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 1800 bytes
font_02_sfnt_off00007dc0.bin
840d8bc1c7d20698eefed78f07072171913207f9da87c75baee1153a60aa67f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC0 10008 bytes
font_03_sfnt_off0000a038.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA038 16312 bytes