Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a146c8421b978e…

MALICIOUS

PDF

35.3 KB Created: 2020-08-20 02:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a3eb4ac29803baebec266a195cae276 SHA-1: 91aae2c4b95a4e08855a6279bf29bc2c4978aaf9 SHA-256: e9a146c8421b978e56295cd96d36b6fd7b5e672988a60bd91bf78faeae17e1b5
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, specifically pointing to 'https://ttraff.ru/pify?keyword=calender+pvc+sheet+machine'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve the ranking of the malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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=calender+pvc+sheet+machine
    • http://xebodo.toddchristophercpa.com/uploads/1/3/1/6/131637419/zuwomopinovew.pdf
    • http://sikoruf.smithsoundmusic.com/uploads/1/3/1/3/131398091/c89e6bac9b.pdf
    • http://someloxu.acorridor.com.au/uploads/1/3/0/7/130740514/rowarirefanod.pdf
    • http://gopef.tailwagmarketing.com/uploads/1/3/1/6/131606069/6053098.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/affidavit_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/fumela.pdf
    • https://cdn.shopify.com/s/files/1/0429/8217/8979/files/vocabulary_workshop_level_b.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/libro_de_caracteres_chinos.pdf
    • https://cdn.shopify.com/s/files/1/0428/5458/0390/files/gitanjali_gems_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1889/files/pikuwofisadikilowati.pdf
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/1435597461.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/demutizumazikobawiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8765/files/42885725808.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/68058056560.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/21629585861.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8623/files/factory_test_report_format.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_off00004372.bin
fab106bafa34ae76e7224d7453c5e3566ffe8d843bf124495c8267a607336e7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4372 5072 bytes
font_01_sfnt_off00005481.bin
e42b13d6eb56961297bcf12a49694fe40bf84079c958c3e1fbda8490ee15d0b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5481 8748 bytes
font_02_sfnt_off0000725c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 4324 bytes