Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ddf8b3287b4d81…

MALICIOUS

PDF

59.7 KB Created: 2020-08-17 01:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad88a057316e0cd01b30e68cf23aced0 SHA-1: 1fb3a33958a03f3fc96cb50181504d7e7a7df52e SHA-256: 20ddf8b3287b4d811ec7e9da7711ad0fde1d83ff3359b52c39389eac8a313849
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure. The presence of numerous links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious URL. No scripts were extracted, limiting the analysis of direct execution behavior.

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.cc/pify?keyword=button+onclicklistener+in+fragment+android
    • http://files.teslphe.org/uploads/1/3/0/7/130740011/7428055.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/barometro_de_fortin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/98370768012.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/article_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0869/files/streamline_english_connections_workbook_b.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/66664379105.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/kagumi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8307/files/65510891574.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/bupotuzepuwijepudetivoga.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/16771573526.pdf
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/xemidubo.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_off00008cb5.bin
5f6e261312367ce2996a429f6522ba344f8aaf533634f10908032bdff43ebaaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB5 5456 bytes
font_01_sfnt_off00009f2f.bin
8ad8341f84bd0a7ceab25d78c99e0b37aae11de77dd273d837cc7e9432b6627f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2F 14404 bytes
font_02_sfnt_off0000cd58.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD58 16036 bytes

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