Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b3cd1967bbbd2e…

MALICIOUS

PDF

33.9 KB Created: 2020-08-24 09:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34b3a41c24d416efa8ac3f699f551289 SHA-1: ea6b436ceaf119a2095e2de512ef6905c687c1e4 SHA-256: 08b3cd1967bbbd2e1ba840ce68c0f056a4090f3bde046e3c4aa7b38957f4fdaf
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 16 external PDF links, one of which points to known malicious redirector infrastructure. The document body also contains a direct link to the malicious redirector. This suggests the primary goal is to redirect users to malicious sites, likely for further exploitation or phishing. 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.ru/pify?keyword=latitude+and+longitude+earthguide
    • http://files.myoutdoorvisions.com/uploads/1/3/2/3/132302940/pisatu.pdf
    • http://files.coastal-curators.com/uploads/1/3/0/7/130776162/taxonudawugem.pdf
    • http://files.swatarachurchofgod.org/uploads/1/3/2/8/132814166/dukulitomo_sivir.pdf
    • http://files.itwasonmyvisionboard.com/uploads/1/3/0/7/130775786/9304546.pdf
    • http://silapevu.goadsandwelldrivennails.org/uploads/1/3/1/1/131164199/bakeberim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/algebraic_geometry_physics.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/jopolegagu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/hallelujah_pentatonix_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/8241/6281/files/6619804888.pdf
    • https://cdn.shopify.com/s/files/1/0431/2963/4970/files/luxara.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/lugafilo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/48216751615.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/notiluvutamukavolofade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/girisunozoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/jujitogej.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_off00004988.bin
9cd828da03043b0658b8a988784f27014c9cb6215b22c8f9e5c34fa372ca07ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x4988 4852 bytes
font_01_sfnt_off000059f7.bin
73f3eb3b51bc5989e69e0b53b26f0aafba5a2218ac476cee7884402ac5bbc490
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F7 9600 bytes