Malicious PDF — malware analysis report

Static analysis result for SHA-256 068c7950f5ec42ff…

MALICIOUS

PDF

44.2 KB Created: 2020-08-17 13:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65dabe47481c32f5687e12d8e6292aa8 SHA-1: 867f12d0b76de62c450d05c029cc7b2d034cb0c6 SHA-256: 068c7950f5ec42ffb7a34724e3a4e7fdb036012c0eeab24650ff41b840da9a56
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and document body text that attempts to trick the user into clicking a link related to 'Fallout 76 motherlode test answers'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=fallout+76+motherlode+test+answers', is identified as a redirector to malicious infrastructure. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic.

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.cc/pify?keyword=fallout+76+motherlode+test+answers
    • http://files.allicphotographyanddesign.com/uploads/1/3/1/6/131637073/winaz_tulezaz_gujoz.pdf
    • http://files.cathyxwu.com/uploads/1/3/0/8/130873872/f92cf7ae.pdf
    • http://xedol.pentasolutionsllc.com/uploads/1/3/1/0/131070998/7dc0928.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/nikoturuviva.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/64581672041.pdf
    • https://cdn.shopify.com/s/files/1/0447/0882/3193/files/bise_lahore_9th_gazette_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/65981702420.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/66414248562.pdf
    • https://cdn.shopify.com/s/files/1/0440/6303/1448/files/gibepopiwalek.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/67180328313.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7413/files/brand_awareness_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/advantages_and_disadvantages_of_technology_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0430/8041/7447/files/el_cambio_climatico_definicion.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_off00006f1b.bin
5b738633b179857ad389d3aaece279b129948897e9a3ec3afcf9d7075342db53
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 5348 bytes
font_01_sfnt_off0000813b.bin
6abe4a3c56d9c64929560cfa9e4f6dbeaecd219500450ec0a318c5ccd4f79547
pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 10296 bytes