Malicious PDF — malware analysis report

Static analysis result for SHA-256 7926b60eead6f96d…

MALICIOUS

PDF

41.6 KB Created: 2020-07-29 12:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c294d2b3070d1ae8434ec5d44ee31f2 SHA-1: eb03c0d582215fb6b5eb000073fa65c3d76922ec SHA-256: 7926b60eead6f96d452c96acf3e4651bcfb991290aefed52d21d59c3fb2ce96b
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, masquerading as a comic download. The ML classifier strongly indicates malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection scheme.

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=phantom+bangla+comics+pdf+download
    • http://files.tabersafehaven.ca/uploads/1/3/1/4/131453144/nokawuwutosozo-xeraz-zijununozezitod-kegonamawi.pdf
    • http://files.buildingfaithfamily.com/uploads/1/3/1/4/131406049/fojoduka-rudidorux-lenigiroxuk-labafutiwe.pdf
    • http://files.alexanderswoodfloors.com/uploads/1/3/0/7/130739533/8f6b463ca3f.pdf
    • http://files.iyengaryoga-concord.com/uploads/1/3/2/3/132302833/mimefikedanabifun.pdf
    • http://files.richlandareafarmersmarket.org/uploads/1/3/2/3/132303269/73cc8d18e73e4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3231/9912/files/powodapifefisow.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/3271336837.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/polenunekidoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/23243248309.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/tanajivutujorajejikok.pdf
    • https://cdn.shopify.com/s/files/1/0436/4677/9552/files/pagokir.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/valudagatinonijuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5032/7451/files/nitobasug.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/39292235224.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/rudikezakoxipe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/39904329406.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_off00006327.bin
cac33cabfea2292e326578022d2ffbd6223315e205e7127b75a8ba068a73452c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6327 5376 bytes
font_01_sfnt_off00007540.bin
be2cc906911536ab52b598e3ce15b0a71214a6e91c6a54e7ee58baa28e0b5d5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7540 9860 bytes

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