Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd670dbdb5097321…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 21:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf2a84d53aae5a7fcc306209c009356b SHA-1: 3e8c3c8094192a23abe6008ef044d188142771fb SHA-256: fd670dbdb5097321746042f38abc37d0e3c5bdb6f2ee8d5e6bfc62fc08cf5e0c
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, characteristic of a link farm designed to manipulate search engine rankings or redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=perbedaan+pasar+modal+syariah+dan+konvensional+pdf'. The ML classifier also strongly indicated maliciousness.

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=perbedaan+pasar+modal+syariah+dan+konvensional+pdf
    • http://files.tchaikovskiana.com/uploads/1/3/0/8/130874566/fodatoziwonunitaw.pdf
    • http://files.darkhorsesaddlery.com/uploads/1/3/2/3/132303035/7dd19e.pdf
    • http://files.chazakbordercollies.com/uploads/1/3/2/7/132740805/babez-doxate.pdf
    • http://files.jedburghgs.com/uploads/1/3/2/7/132710630/8601675.pdf
    • http://gazol.thomasjonesschool.org/uploads/1/3/0/7/130739590/17acd1c.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/organic_chemistry_david_klein_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/43326363752.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9203/files/8652111378.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/bis_prot_warrior_classic.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7174/files/bilekugazitoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/pepedalodidarowaximugidel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4214/files/gilexogikoduwagurilig.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/japugugoliwuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/17252016054.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/20652948382.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/perokazijuvamife.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_off00006792.bin
06b1acfb699737e9aadb844dc15a8401e6b317bb57d25303bdeb4cd9fd4ad8eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6792 5648 bytes
font_01_sfnt_off00007aa1.bin
7292096904203f0ce24fdf6907fc406b68488498a53f133e4d61a834d10b4c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 10060 bytes

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