Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a41594cd030ec0b…

MALICIOUS

PDF

38.8 KB Created: 2020-08-30 12:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dde706f156d45916a14fc36f4dd0f65 SHA-1: 793c94a6e15a44960cfaa904b60d58c6c583f391 SHA-256: 0a41594cd030ec0b1d69965d47dd95b77024f0b1a705dce31a00cf25d62a4e03
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.ru/wix?keyword=hitchhiker%2527s+guide+to+the+galaxy+quizzes', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to direct users to this malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy 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.ru/wix?keyword=hitchhiker%2527s+guide+to+the+galaxy+quizzes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/2379/4077/files/wunevojijav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/beriberi_que_es.pdf
    • https://cdn.shopify.com/s/files/1/0437/6920/0791/files/95183057641.pdf
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/15208020207.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/french_surnames_list.pdf
    • https://static.usrfiles.com/ugd/eda9ba_1cd321c53db140ed9d2fff8d7b4a241d.pdf
    • https://static.usrfiles.com/ugd/253000_f560919a0e8a492b968c4b85afdfab0a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/bhagavad_gita_as_it_is_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/fogubid.pdf
    • https://cdn.shopify.com/s/files/1/0435/2724/1879/files/free_concept_map_template_for_nursing.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e2aacc39c9b4d2cb4a4ad025b9efbc1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0812bb7e82e41c58e9700235dc98bac.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_off000057b2.bin
fb067e7e0055137b9ad6bfe2c14158b518cc6b59f17526eaf485b302f80af9fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B2 5608 bytes
font_01_sfnt_off00006ac4.bin
3c376ad5578b2750ccf705543244df714d315ecdeab42d56ecef8e67947e18f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC4 10552 bytes