Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a58ebae38e6f61f…

MALICIOUS

PDF

33.8 KB Created: 2020-08-23 20:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12dfdede4c8211c09715c87f102d70c0 SHA-1: 340897694714de332821470a67e1eb9a5818f80c SHA-256: 6a58ebae38e6f61fecf04b72fe1104b7512b78681a9630d9cc1a37a7448ccfdd
154 Risk Score

Malware Insights

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

This PDF contains a significant number of embedded links, many pointing to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=lagrange+ga+weather+report', is flagged as a malicious redirector. The presence of a large link farm and a malicious redirector suggests an attempt to manipulate search engine results or to lead users to malicious content, potentially as part of a phishing or malware distribution 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.ru/pify?keyword=lagrange+ga+weather+report
    • http://mimowotu.earthandwaterwellness.com/uploads/1/3/1/0/131070450/3859964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/tenigisukitiminasokokegol.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5765/files/24415532797.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/alkaloid_extraction_from_plants.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6042/files/aconex_oracle.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/61568684045.pdf
    • https://cdn.shopify.com/s/files/1/0433/6343/4654/files/kivanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/34967380511.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/immunotherapy_definition_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1121/0398/files/45654979390.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/rodomevaroguxasagozevu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8154/6390/files/xemoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/14985984612.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_off000045c6.bin
b5901010c7126acc7a8837a8550693da6fe96cc32d313a6828d2c0ff643df099
pdf-font-stream PDF embedded font (sfnt) at offset 0x45C6 4904 bytes
font_01_sfnt_off00005682.bin
15bd59244990d071d119a35a2a5d86531d38bf9cc5aa78e199c4fc2278db59ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x5682 10128 bytes