Malicious PDF — malware analysis report

Static analysis result for SHA-256 692bffa08724c5f9…

MALICIOUS

PDF

66.5 KB Created: 2020-08-04 22:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4798344ba728c5d7c97275e5a9d3f616 SHA-1: 7847ca321b7eca9390b8cf23d616b22d2a498923 SHA-256: 692bffa08724c5f998be890151fc07384745e58bec08c8cc6a9c0f0958658c88
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=all+phylum+of+kingdom+animalia+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the animal kingdom and the URL, suggesting a lure to a malicious site. The presence of numerous external PDF links further indicates a link farm strategy, likely to obscure the malicious destination.

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=all+phylum+of+kingdom+animalia+pdf
    • http://files.julianoshea.com/uploads/1/3/1/4/131453807/jibumojexoje.pdf
    • http://files.katyprairiepromenaders.com/uploads/1/3/1/0/131070872/616ba6f03f0b5.pdf
    • http://dakos.mariebyrdsproul.com/uploads/1/3/2/6/132695615/26d774e85f9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/rabagolumokegekorikatota.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/fonomegiwedukuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/37155731333.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/66211973847.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/bilanupowufixuvewab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/ferogofelugifor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/55058840881.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/69718991028.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/43597628233.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/vituwevomifel.pdf
    • https://cdn.shopify.com/s/files/1/0429/2644/0607/files/kunerox.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/16010019156.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/coriolis_force_derivation.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_off0000b795.bin
a0fa8fabcce399139da0b03fef8a3c46ad9e4c9f66002fd0f8cce178e76da6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB795 5020 bytes
font_01_sfnt_off0000c886.bin
06a9a9063c554c165e37c4e796cad10c00d4afd40477685d5ebdb32ccba8ca97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC886 11324 bytes
font_02_sfnt_off0000eeb1.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 4324 bytes

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