Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bc87f09513fbc9…

MALICIOUS

PDF

46.7 KB Created: 2020-08-04 21:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c5988da2005f5d4a864ac55cd2d055e SHA-1: d33f5353c0f31b40a838931a343116346fb5ca0f SHA-256: 73bc87f09513fbc92b2ca337e65f041c8637e260873710728864a18d4a4bc202
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=biodiversity+loss+and+its+impact+on+humanity+pdf'. The document body itself is heavily obfuscated but contains references to the same malicious URL, indicating the primary intent is to redirect users to potentially harmful content. No scripts were extracted from this sample.

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=biodiversity+loss+and+its+impact+on+humanity+pdf
    • http://files.patriotreport.us/uploads/1/3/1/3/131398334/6576249.pdf
    • http://files.shoreexcursionspuertoplata.com/uploads/1/3/2/7/132740620/pinupivuvojujoxa.pdf
    • http://files.ahitalukdar.com/uploads/1/3/1/3/131380420/4463154.pdf
    • http://files.spachurches.com/uploads/1/3/1/3/131398308/9426335.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/tojurunonigerebolu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/worogimemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/70011017196.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/rirumuxipimazobexejase.pdf
    • https://cdn.shopify.com/s/files/1/0434/3549/1490/files/dasomunarosof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/71771967971.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/7172780520.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/jejidaxaperekalimekedosag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/mulonaraxusavirub.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/temoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/9097518634.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_off00007781.bin
3856616b14065993883c0ff2d2a67107499aa0168b8dc402ebf6a2745fecd4e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 5608 bytes
font_01_sfnt_off00008a7b.bin
bfbf82a74668d3d75ccd8db5840946849ad12d9b4e8b70f5786ee87530f719af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7B 10340 bytes

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