Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd41a31bf51347fd…

MALICIOUS

PDF

45.3 KB Created: 2020-08-19 06:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be6f9bee7f09bcc34ecfda755fc75e9a SHA-1: 65309bff1ad8e72dcbdccc44fcd456d4774e9108 SHA-256: fd41a31bf51347fd1621353ddd315fb00c93f0bbdbb2ba34988fdcc2c4c615ec
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=dj+wale+babu+song+lyrics'. Additionally, the document body, though partially corrupted, contains this URL and numerous other embedded URLs, many of which are hosted on Shopify and appear to be part of a link farm. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring users to a malicious site via these links.

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=dj+wale+babu+song+lyrics
    • http://files.jonathancaverley.com/uploads/1/3/1/4/131453998/xukirilipu.pdf
    • http://files.mygara.com/uploads/1/3/1/8/131871849/cb73f3277772eeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9446/files/long_510_tractor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/13436282741.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/sovirebubere.pdf
    • https://cdn.shopify.com/s/files/1/0429/0795/9452/files/37860891734.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/eduqas_examiners_report_english_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/ssa-_1724-_f4.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/27144924929.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57727452667.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/81632619393.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_off00005915.bin
e116119ec0b05bd2499bd09eeb349e9cc41ef082566591127d0a38b6b077d4d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5915 5180 bytes
font_01_sfnt_off00006ac9.bin
0227fd53036d586aa8211b07495b60447a65e876a33955c71eba716b12db3175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC9 14772 bytes
font_02_sfnt_off000098d2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D2 4324 bytes

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