Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aa47af490c112a8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-25 08:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f934526023e47bb87c7f712ff4a38d6 SHA-1: 6e1ca985fe0f20f03cb92a2ba55f2bf36d7151bf SHA-256: 0aa47af490c112a852b404a8783fe0df047139f735509d11804793e143bf23b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector. This suggests an attempt to obscure the final malicious destination and potentially engage in SEO poisoning or link farming to distribute malware or phishing content. The ML classifier also strongly indicated maliciousness.

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=vindictus+armorsmithing+leveling+guide
    • http://vedajo.oaklawnbaptistchurch.org/uploads/1/3/1/4/131409200/5343237.pdf
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/mixitopusisix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7199/6053/files/areas_de_asociacion_cerebral.pdf
    • https://cdn.shopify.com/s/files/1/0465/1882/9206/files/insomnia_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/niko_bellic_soundboard.pdf
    • https://cdn.shopify.com/s/files/1/0462/4318/4794/files/node_js_format_json_string.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/2002_honda_civic_ex_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/house_rental_agreement_templates.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_off00005f1d.bin
304460ff978670f7b900e538c3837bdf5fbe34274316c6222bc7d798e0b5a22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1D 5380 bytes
font_01_sfnt_off0000713c.bin
f777ec859335bbf39990912ca3f9f1bd4d43cd598b5dfbd1a32817d3c34fc669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 10084 bytes

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