Malicious PDF — malware analysis report

Static analysis result for SHA-256 e622a57b35b540b8…

MALICIOUS

PDF

41.2 KB Created: 2020-08-03 23:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 989fc2d9ff35f0a6bc2752aae9bb13c1 SHA-1: bb7d02d2f803b6b8f607325f9be772fc4e1d3226 SHA-256: e622a57b35b540b8d683073c3b16c5f327cb1f2ba19e26f9290c520b7b5ed53d
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm hosted on Shopify. One critical heuristic indicates a malicious redirector link to 'ttraff.ru'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=trumpet+classical+music+pdf', suggesting a lure related to 'trumpet classical music'.

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=trumpet+classical+music+pdf
    • http://files.highwoodchamber.com/uploads/1/3/1/3/131381414/moseges-kolopov-fenudafiveder-kifarijer.pdf
    • http://files.purposedforapurpose.com/uploads/1/3/0/9/130969576/lupapemoxal.pdf
    • http://files.chefreginacooks.com/uploads/1/3/1/3/131384589/pubuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/jolajezekozudorizi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/tugoso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/22740218080.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/31911676623.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/demoxoxizoman.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/kuwudatesukebunowizebot.pdf
    • https://cdn.shopify.com/s/files/1/0428/5536/6822/files/funtopia_usa_middle_village_ny.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/pandas_write_to_csv.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/minecraft_pe_0._12._1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/82431971416.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/11182958700.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/1976_monte_carlo_landau.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/67281022985.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/durisifanapadogubejaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/lujozed.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_off000063c7.bin
f656e66bf5db33fc0b807d19ac6fa1523b2bf2372fdb0e28d9b0bf0ce148a263
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C7 5248 bytes
font_01_sfnt_off00007583.bin
5d0be56268f7b0f9601b747ed74ecef6d8ac370f447b0db03ac7bdb0139fa3c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7583 9992 bytes