Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed2aa79f389744d…

MALICIOUS

PDF

39.3 KB Created: 2020-09-16 17:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0840f500b0f9a2091d0a848e48ce2aa2 SHA-1: f4b87d0477f86f711898b4f1fb995690e1908d2d SHA-256: aed2aa79f389744d6afa9c5d6f692f9ae48d1f5084c9b61b70ab35635c019fb8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a common tactic for SEO link farms and redirecting users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'jlg 1930es scissor lift manual' and the malicious URL, suggesting a lure to trick users into clicking the links.

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.me/wix?keyword=jlg+1930es+scissor+lift+manual
    • http://zokaxovi.fishersflowers.com/uploads/1/3/2/6/132696212/bosotogebipiki.pdf
    • http://vapavesa.jennbower.com/uploads/1/3/0/9/130969461/8dee3450bb2e.pdf
    • http://files.ninareistad.com/uploads/1/3/0/7/130740298/dodezuvuloru.pdf
    • http://dunoxukex.laverdasthoughtsandmemories.org/uploads/1/3/1/4/131438583/dbf149f8296.pdf
    • https://e3ca050a-e909-4faa-956d-b98382aa3e1b.filesusr.com/ugd/dad7b5_28d3cd6b0eec48579f05e59cd3c5664f.pdf?index=true
    • https://df96e6f4-a21b-448b-9e86-9c7c9997b9f0.filesusr.com/ugd/b926a8_ea564e91e36d4ad4a05f6b668008fb5f.pdf?index=true
    • https://0b1f8010-0b94-47cd-bda0-18ad10f4fba3.filesusr.com/ugd/3225da_07d38eedd0cd433d800c31bd30456fb5.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/roxunaxokaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/calculus_textbook_thomas.pdf
    • https://cdn.shopify.com/s/files/1/0434/2202/3847/files/dodopivunodewed.pdf
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/gexesujezakirizokomapis.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/wekupimukuduzapirogidoga.pdf
    • https://cdn.shopify.com/s/files/1/0430/1609/3849/files/depivowavoduvej.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3d.bin
dc2e48bfea9eb0ced0bd2eecfb380498c85f96c41425a97d842ac536b277529f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 5704 bytes
font_01_sfnt_off00006f92.bin
72e26c76e6c3d1169fa0f9b7d1e9c35de188ab4ae1301a94eec1ed5f29dd8043
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F92 9692 bytes