Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd1a5f01ab03d42…

MALICIOUS

PDF

45.1 KB Created: 2020-08-06 17:09:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97333911098cac9aa3638b81e0431753 SHA-1: f49495a6a72ad27016d4062d2ca70f6de999adea SHA-256: 8fd1a5f01ab03d42529a815dfcadbe9966ca5f0a4d9e87c554747261c20e4f59
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.ru/pify?keyword=lateralization+soil+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=lateralization+soil+pdf
    • http://files.youarentaloneproject.com/uploads/1/3/0/8/130814874/f55b659.pdf
    • http://files.endurancecomics.com/uploads/1/3/1/4/131414134/6216540.pdf
    • http://files.stmatthewsjamestown.org/uploads/1/3/2/7/132712096/8b15e66dda51bb.pdf
    • http://files.ivfround.com/uploads/1/3/1/3/131382700/xipano_jiferirufelisej_jutoxagekipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/fepirepoleraripe.pdf
    • https://cdn.shopify.com/s/files/1/0429/7120/1695/files/77173131766.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/riwukewobakojuxadetiriwud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7613/2774/files/sonda_vesical_cuidados.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4328/files/pabexixusomamul.pdf
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/danby_portable_air_conditioner_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/34231603306.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/57198879262.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/from_inquiry_to_academic_writing_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/what_is_hello_in_pig_latin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/jimulufup.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/
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006641.bin
d7d833a646cda755dfa2debcf2f897c623c7d893dea1d6517c54e5420207b105
pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 4816 bytes
font_01_sfnt_off000076ae.bin
91a5a092e9e374ba2c638f0162a159a0d96d60656e9c38c70c0c3d26e344f06b
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AE 9652 bytes
font_02_sfnt_off0000979f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x979F 4324 bytes