Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e5ea746f02752e…

MALICIOUS

PDF

65.2 KB Created: 2020-08-04 13:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae1fa654d6c5c210e7e127c76accaa5 SHA-1: 09015233540977e7751df9ff1b9a4f5de765b001 SHA-256: a4e5ea746f02752e0a409fb718dd0152ff2e1785bdc921a7eef6cafb2c956ace
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=english+synonyms+words+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0434/2883/9581/files/zejufuto.pdf'. The document body, though heavily obfuscated, contains references to the redirector URL and the topic 'English synonyms words pdf', suggesting a lure to a malicious site.

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=english+synonyms+words+pdf
    • http://files.trinitytrainingandsecurity.com/uploads/1/3/0/8/130874030/fifob.pdf
    • http://files.thelittletheatreindia.com/uploads/1/3/1/6/131637306/kilinumekebibi-gewelu-liwizenu-pexesipopuzozud.pdf
    • http://files.aquafuelresearch.com/uploads/1/3/1/4/131407965/1849415.pdf
    • http://files.englandnutrition.com/uploads/1/3/0/7/130738720/b53c747ff95d8ac.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9581/files/zejufuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/8455/4141/files/brgschaftserklrung_muster.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/68621542159.pdf
    • https://cdn.shopify.com/s/files/1/0437/1369/1799/files/90918601050.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/51697474268.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/2547243785.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/manevomibelexujonimafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9277/files/92351028246.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/dovijivaked.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/wujibivedekuxozefafe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/32296071123.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_off0000c0df.bin
92f968d155fb2f45940c1ede91efb06291b10dceb8fd0497bca9b7ddd0be1771
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DF 5396 bytes
font_01_sfnt_off0000d32f.bin
fd9221e37939a2f44a554afde8c41f491e76261b928ea2d203418c59688acf8d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD32F 10672 bytes