Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c469a6ad34b101…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 05:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b03928def1edbae82e6d231935fae60 SHA-1: 6042ddf2e3dcc4c3ff3fa4de3991e8e09d096516 SHA-256: 63c469a6ad34b101ff842fc4f6f5263df72374b3c9b4bda762846ddf922eaad1
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding numerous URLs, many of which point to other PDF documents. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=optex+redscan+pdf'. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, suggesting an attempt to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=optex+redscan+pdf
    • http://files.fnplweb.org/uploads/1/3/0/7/130740262/gazozariz.pdf
    • http://vizigo.missionmobilizationjonasmuyima.org/uploads/1/3/1/4/131407089/a122c542c2f04.pdf
    • http://files.thesummiteauclaire.com/uploads/1/3/0/7/130739593/zazox-zigugigop-vatopuja-rudorefifun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/articles_of_association_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/tubumojugivulufojofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/18348094143.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/jijujix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/62184530018.pdf
    • https://cdn.shopify.com/s/files/1/0438/4754/9088/files/building_electrical_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9557/files/47704160817.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5973/files/rilasulukilamuwunutibipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/32502413744.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/59228652900.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/international_accounting_standard_38.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/romironumopazebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/xonamewesi.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_off00006802.bin
75c18d5f0e1b143dfa601c1d07d9555bfeec85ae95905bc9a8bca591d5727c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6802 5212 bytes
font_01_sfnt_off000079d1.bin
3662a0d87071a43bc6237ddfaa09efef6145d3cd36b8bebe378a212550aa2b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 10208 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.