Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f8aae9f91099f0…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 00:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d948539374c22601bb4af6bd92106d7 SHA-1: 47133a938e2a77db53d779a0abf832e355802de7 SHA-256: 01f8aae9f91099f010030ab9bea328e94a5c0df05d3af73e513560645061a0be
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes a URL that appears to be a lure for music-related content, while other embedded links point to what seems to be a link farm for PDF documents, including one related to accounting solutions. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector suggests an attempt to lead the user to a compromised or malicious site.

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.cc/pify?keyword=lagu+xaluna+ambyar+cover+gitar
    • http://nofafa.npanglers.com/uploads/1/3/1/6/131636727/wadosegulu.pdf
    • http://files.chicagokilnrepair.com/uploads/1/3/1/8/131872178/mifosebadazagomuso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/advanced_accounting_2_guerrero_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0452/0011/3813/files/ronugozuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/momotojinufasunufinof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/pakerijivas.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/anger_management_therapy_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/23119226291.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/nabexitalaxipevopox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/26721114682.pdf
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/56655981896.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/gorufizubuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/gojotupavomabivunawofuvi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d9.bin
b77dad1775ec2b0b7f2ca647f040a68c13a90fd07e845c1f8075330ab0435c94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D9 3256 bytes
font_01_sfnt_off0000607c.bin
2b3bfa1ef405d968d144f23bd6d19719da811f18ee36c9eec81b0c1f8368f49a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607C 5252 bytes
font_02_sfnt_off00007257.bin
2d710d038d858b7249e6c5785f8131aab4a624b743c11a541841a0ec6dfb213d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7257 15540 bytes

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