Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e864a5dbd84a4c…

MALICIOUS

PDF

53.2 KB Created: 2020-08-06 05:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3576c91ff032982ec0dc536f77052fdc SHA-1: 39f0e6976d4166c7f91435ae0a458300b8c579d3 SHA-256: 63e864a5dbd84a4cda5dc1adfcd671b6834624c20afe2a5b458fae1edae75ca3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a known malicious redirector, suggesting an attempt to deliver a malicious payload or phish for information. The document body, though heavily obfuscated, contains text related to 'woodworking workbench plans pdf' and the malicious URL, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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=woodworking+workbench+plans+pdf
    • http://files.kaushikthallapally.com/uploads/1/3/1/3/131381555/1790553bd1.pdf
    • http://files.thepisceannomad.com/uploads/1/3/1/4/131438418/zilurafidok.pdf
    • http://files.goldbergacademy.org/uploads/1/3/0/8/130874431/6026840.pdf
    • http://files.bridgingbrowncounty.org/uploads/1/3/1/4/131437029/rapegoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/99269578762.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/zibigozebimeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8137/files/pinizukasemu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0945/7825/files/sizisupexepekufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/14457563615.pdf
    • https://cdn.shopify.com/s/files/1/0431/2783/2733/files/wejuvit.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/joxokewitojasuresufanonak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/tizipalamasapab.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1959/files/nisuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5991/2610/files/accept_file_input.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/davajumaroxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/levigak.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009007.bin
df79044c54fdedfb7a1ea074c40d4870d4d8afd5836ace3bee2ba1906025fb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9007 5724 bytes
font_01_sfnt_off0000a39b.bin
297b6499aab885ef8c2e5c9575f061e2b5464d2024c83d28a037ef3685a8a38e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA39B 10528 bytes

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