Malicious PDF — malware analysis report

Static analysis result for SHA-256 692a649b5b29a05d…

MALICIOUS

PDF

53.5 KB Created: 2020-07-09 16:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f60b54dde40a25f096cde2ddc5cfb8a9 SHA-1: 6c02f8276343a3dab919dd91d8fca31cd7af1a03 SHA-256: 692a649b5b29a05de44db4229efcf06ac32f78fd9bbf23b649c94fb111b36b6e
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to known malicious redirector infrastructure, which is likely intended to lead the user to a malicious site. The document body, though partially obfuscated, contains keywords related to a servo drive manual and a URL that appears to be part of the malicious redirection chain.

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/wb?keyword=shinko%20ac%20servo%20drive%20type%205000%20manual%20pdf
    • http://files.paramountrec.com/uploads/1/3/0/7/130775827/wanuvawofi.pdf
    • http://files.cumberlanderfamily.org/uploads/1/3/2/6/132681030/41208a255021e3e.pdf
    • http://files.framemysore.org/uploads/1/3/1/3/131384789/7349004.pdf
    • http://files.coburnsandandgravel.com.au/uploads/1/3/1/4/131438296/kakejisorak.pdf
    • http://files.moselygallery.com/uploads/1/3/1/4/131409385/pojegad.pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • http://files.mermaidmarinabubbles.com/uploads/1/3/1/4/131406391/0bfbd3dcdd936.pdf
    • http://files.neverwares.ca/uploads/1/3/2/3/132303138/zepepigale-bipejimip-kudarunuputa.pdf
    • http://files.butleralabama.org/uploads/1/3/1/3/131379290/e3e6c0168c4.pdf
    • http://files.iveymission.org/uploads/1/3/1/3/131383982/9564347.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://bokomosuv.files.wordpress.com/2020/07/roninagomuzoxipiter.pdf
    • https://tubofizuk40957132.files.wordpress.com/2020/06/31797641193.pdf
    • https://banaxog.files.wordpress.com/2020/06/juloxizosowebemanixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61047377128.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekefokatonerosabiwifeva.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000790a.bin
59b9b2820221abdf4f207673fec1631de4278d5ae27ec1cddecc9bbb7646bf5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790A 5872 bytes
font_01_sfnt_off00008cca.bin
de3b15883c9b831e77969388af016b431a68a29e284ac7dafce902a37e390940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCA 9040 bytes
font_02_sfnt_off0000a638.bin
3906687eac14b02227f43e4d986d77476b90cabf0cb5d923618f837a6a62b2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA638 10068 bytes

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