Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ca05dec61ede3f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-02 11:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbd6bf791d0fac07b59ee170a4d85fdc SHA-1: 9c81e732c8eb720d90ad9511d88d1d275e848dc2 SHA-256: d9ca05dec61ede3f180057f12d74fdefb559f277ade47baf3bbf531d9970c908
152 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on Shopify, forming a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=battle+run+cheats, which is likely used to redirect users to a malicious site. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a vehicle for the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=battle+run+cheats
    • http://files.hazelsnetogo.com/uploads/1/3/1/4/131407737/f931601a.pdf
    • http://files.1stmiddletonscouts.com/uploads/1/3/0/8/130813362/129863.pdf
    • http://files.paintmypottery.net/uploads/1/3/0/9/130969728/sozedotozomekeroze.pdf
    • https://cdn.shopify.com/s/files/1/0433/3505/7559/files/22896355608.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/90236876422.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/78324230543.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/forob.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/wibupevekina.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/84144931289.pdf
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/7891730646.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/getenupuzuzikelenifaveben.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/60172117891.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/weroxafilulixin.pdf
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/96902180836.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/dokeka.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/sirobidasafufiwoxulitu.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_off00006652.bin
1bb452b3c698cfc17bf5e0344d84adf874f4973d5789d98e4aa01a6b06a118cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6652 4936 bytes
font_01_sfnt_off00007710.bin
ab21907d984d5a094e49bfb2e667299b1c9ba1049dfe87b1d95ab7a5147882fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7710 10240 bytes

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