Malicious PDF — malware analysis report

Static analysis result for SHA-256 84879e49ae95fd65…

MALICIOUS

PDF

57.4 KB Created: 2020-08-13 23:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d62d63c98196cb23405f3f7777bcf1c5 SHA-1: 549e5896d9038c14fffe11452e3696834235b484 SHA-256: 84879e49ae95fd6541dcaf0d544d2022a1ed52fa66ce3939a4749954f5105595
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document's content, though obfuscated, includes a URL that appears to be part of a link farm designed to distribute malicious PDFs. The presence of multiple Shopify links, some flagged as benign and others unknown, suggests an attempt to blend malicious content with legitimate-looking resources.

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=griffon+corporation+annual+report
    • http://files.wifespiration.com/uploads/1/3/0/7/130775309/d4840fb6e23.pdf
    • http://files.bagearoutdoors.com/uploads/1/3/0/7/130775222/a562079b43e26.pdf
    • http://files.sweethartbaking.com/uploads/1/3/1/3/131379743/tiwowetejo-xopezobud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/130927906.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/sibek.pdf
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/maxiwoluxalolubijiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/gene_flow_and_genetic_drift.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72619586694.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/21881272382.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/microsoft_office_2016_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/39493842511.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1333/files/cat_3406b_service_manual.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_off0000a4c8.bin
071017bb2dec25a8e216551cd54315521cc52a67708ab20bfdd092a1fb01e257
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C8 4864 bytes
font_01_sfnt_off0000b55c.bin
b23f7126cf29f6040daa5b3d28b00aa416b38a167d10033b69ccda8b80a3563c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB55C 10376 bytes