Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19487df1f01baec…

MALICIOUS

PDF

46.6 KB Created: 2020-08-07 23:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad2951529d8453305762cc0d7cfe95a9 SHA-1: f49687356298f068a79994de19bb46c5775c3edc SHA-256: e19487df1f01baeccffbdb74602d2b6c9c2123b9eb0527283206b8864a197800
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to ttraff.com, which is also present in the document body. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which lead to benign Shopify domains, but the primary redirector is malicious. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.com/pify?keyword=br%25C3%25BCche+multiplikation+pdf
    • http://files.rayrodeo.com/uploads/1/3/0/8/130874554/6458400.pdf
    • http://files.actcdc.org.au/uploads/1/3/0/9/130969987/raguxebogafi_lozakasiroret_wokudotuba_genezu.pdf
    • http://files.missrosieweddingsandevents.com.au/uploads/1/3/1/3/131384113/xutemofutewun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/modular_belt_conveyor_design.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/basic_electrical_engineering_book_by_bakshi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/bullying_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/active_and_passive_voice_present_perfect_tense.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/doxogizulimepaval.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/8765815252.pdf
    • https://cdn.shopify.com/s/files/1/0440/9750/3384/files/576838882.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/gokinagurabizijasusavov.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3789/files/importance_of_awareness_campaign.pdf
    • https://cdn.shopify.com/s/files/1/0434/5502/1223/files/12489300399.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/worivedelisi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/wii64_wad_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/kotifopuzirozulezex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/basetamuzejirebexo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/stihl_036.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e2c.bin
d50983ce3fdd4a11dfead7b1e846051dba2382b8fad5462e2de2c51db2ca727e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2C 5448 bytes
font_01_sfnt_off0000805b.bin
51a5892d65d72873f8c4c0de60dcfa9fd06398af34543b6e708f93fefd6e8e3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x805B 13964 bytes