Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2de5df20e16dc9b…

MALICIOUS

PDF

36.0 KB Created: 2020-08-25 01:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 980abfc523f14eba338592c48593ebda SHA-1: 470e4d767f843c4089131ba8a0316e5f8a7acd3d SHA-256: a2de5df20e16dc9b827228b933223e67eb2899950fba9424822d8266f18acefe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external links, suggesting a link farm for SEO manipulation or phishing. The primary malicious URL identified is https://ttraff.ru/pify?keyword=crysis+gameplay+android, which is known to redirect to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure.

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=crysis+gameplay+android
    • http://files.triyourlimits.com/uploads/1/3/0/8/130874518/raratetirosoru-wukexifow-fajuxuna.pdf
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/rasedivifes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7571/5743/files/57254576697.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/43661208191.pdf
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/jogeme.pdf
    • https://cdn.shopify.com/s/files/1/0434/9784/8996/files/sufelid.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6666/files/sum_cell_in_excel_multiple_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/mijopakex.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/jelakopikaposejexezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/warhammer_40k_8th_edition_faq.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/26864942138.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/blood_money_songs_320kbps_pagalworld.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_off00004ed9.bin
b7b0af7be3c0dd9b79895f56e26d962c60e31a6489fd360eb6f6eb3a6a7d3cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED9 5288 bytes
font_01_sfnt_off000060be.bin
944b8ca48d3e283a898bc5807d4092d22eaaad04f442faba5a514f22e290f2b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 10188 bytes

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