Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a78002aa74db698…

MALICIOUS

PDF

47.5 KB Created: 2020-08-01 23:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aba16a60d6b6429323d540be525f10b1 SHA-1: 5a6caccd449356912e75bc6060c86d1c2f89e477 SHA-256: 3a78002aa74db6987321e40119d1458f70da88272cc434417f74abc9ef9a48b7
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the string 'Linkedin share url' and the malicious URL 'https://ttraff.ru/pify?keyword=linkedin+share+url'. This suggests a phishing lure related to LinkedIn, aiming to redirect users to malicious infrastructure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the final malicious destination.

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=linkedin+share+url
    • http://files.ministryofbaby.com/uploads/1/3/1/4/131438038/zugiretoxane_lufoz_sofosadofego.pdf
    • http://files.emiliafaro.com/uploads/1/3/1/3/131380786/livovodupadunejul.pdf
    • http://files.rosholtstingersyouthfootball.com/uploads/1/3/2/6/132695651/00af4.pdf
    • http://files.gatheringsthrift.com/uploads/1/3/1/4/131407818/478736.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/23378748542.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37278413385.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/86864673834.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/78635160986.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/99737097978.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/todabobukumime.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/50407160649.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70838758317.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/fajosoxigazomifelodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8429/9936/files/kenshi_auto_haul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/88094091283.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/filagivekitewowirupizeno.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_off00006e97.bin
afb1c950fbf9e2c0995a5ede8e2e83e2c28f86e4cb8145c5fbdc69c6df4c2534
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 4612 bytes
font_01_sfnt_off00007e1b.bin
58b61ea3f127c7f0835c608fe4f149d693edb4c6c0373781bd41ffe82ace080c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1B 10872 bytes
font_02_sfnt_off0000a33a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA33A 4324 bytes