Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae34561b4991467…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 06:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9f90f1a1c990a6f28b2761540c9d7e1 SHA-1: c642acf2b1f1ff4141cd7bdf34567bb51095986c SHA-256: 4ae34561b4991467236f496c1ade3653a06b425068a7818ca1329c232bee6b0e
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The primary intent appears to be directing users to malicious sites through a link farm, likely for further exploitation or phishing. No scripts were extracted, and the PDF structure itself is the primary vector.

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=lagu+alala+sayang+lirik
    • http://rakapujaj.withmelshelp.com/uploads/1/3/0/9/130969465/govej-nopitasezuzef-binojedol-vukinizosi.pdf
    • http://files.mrkellymathclass.com/uploads/1/3/1/1/131164112/ce3fd.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/pekoxiberejuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/xawibateniwukugawosav.pdf
    • https://cdn.shopify.com/s/files/1/0432/7328/9894/files/famufokolopefama.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/noxutenutosenoraf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8835/4207/files/9789112456.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6396/files/nabajatolofanurulakubun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/sajajaxetesizajasupusara.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/93544356484.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/vamavowagitifesobuwumor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7506/6273/files/90924780352.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0906/files/gatunoponezawar.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/3512237761.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_off00005943.bin
7d8d2a41c5802552684fbd0eec1093be0d93aeb60fe65accf97759fd4c6ea10c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5943 4532 bytes
font_01_sfnt_off000068a3.bin
60bf23708f388d2c48d562667ea5cf44d96f1ffb36362e0316674af6cc3c06f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A3 10084 bytes
font_02_sfnt_off00008b25.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B25 4324 bytes

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