Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e46e7d6b817b3c6…

MALICIOUS

PDF

33.4 KB Created: 2020-08-13 04:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 065b6fbf0f2d334749367187e08e1fe6 SHA-1: ade818517d815ad5b651595c25c5473cb7f89533 SHA-256: 8e46e7d6b817b3c6de3b4c7dee880f1005a8ef902f151136aa2e0dd2b331c5c8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.ru/pify?keyword=banana+boat+song+sheet+music+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. The primary goal appears to be redirecting users to malicious infrastructure under the guise of providing sheet music.

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=banana+boat+song+sheet+music+pdf
    • http://gamamo.lifeofenergyretreats.com/uploads/1/3/1/3/131383965/ed45b6b8309792.pdf
    • http://files.cgburgin.com/uploads/1/3/1/4/131483955/ccb287d8098c.pdf
    • http://files.fortdavisalabama.com/uploads/1/3/1/3/131380889/d59fdbb.pdf
    • http://files.blackmonmarshall.com/uploads/1/3/1/4/131437515/a59227384a42.pdf
    • http://files.danielandnatasha.info/uploads/1/3/1/0/131071114/1910230.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/la_flor_del_azafran_amarillo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/fifekegesilazagipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/90988515791.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/lumbar_back_pain_stretches.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/nouns_verbs_adjectives_adverbs_pronouns.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/37857050216.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/68074678394.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/sebufuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10542261424.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/check_cpu_temp.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/pewoxifisudidivajokuda.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_off00004506.bin
966845d7c1a6aa40d31d6064768c5685a13fb1ce086eb1aacf03810dc80680db
pdf-font-stream PDF embedded font (sfnt) at offset 0x4506 5632 bytes
font_01_sfnt_off00005802.bin
3db78835464580818e0c94831bb8d4f8c6f36deef7ac8317ab41f645312e169f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5802 9588 bytes