Malicious PDF — malware analysis report

Static analysis result for SHA-256 817a0eee748d869f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 11:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 444ce218ba70977d0732e0b44ba3c455 SHA-1: badb4f4c9fcf51c6e6ffe92dde6323e0198b7a49 SHA-256: 817a0eee748d869fb9092712fd9ca6170b6d8d6f5a06e4223545af05f76ed9cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body and embedded links suggest a lure related to a "Burglar bill book pdf", likely a phishing or scam attempt. The presence of numerous external PDF links, many pointing to Shopify, further supports the idea of a link farm or content redirection 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=burglar+bill+book+pdf
    • http://files.foodforthoughtandprofit.com/uploads/1/3/1/4/131452959/javipejodek_fofexo_muruwajegi_roparufivoxab.pdf
    • http://files.buttecollegebcea.org/uploads/1/3/0/7/130775607/fumisot_zawezuliladiwek.pdf
    • http://files.andrewscole.com/uploads/1/3/1/6/131606198/piwoxaputo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/zexatal.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0133/files/16503759974.pdf
    • https://cdn.shopify.com/s/files/1/0432/1060/4705/files/azotemia_renal_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/rimagelison.pdf
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/siyavula_grade_11_physical_science_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/luwuvavamamefilelete.pdf
    • https://cdn.shopify.com/s/files/1/0437/6759/5165/files/descargar_libro_aura_gris.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/7006521621.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9533/files/scepticisme_philosophie.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/plasenta_letak_rendah_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0428/5258/1542/files/styled_components_hover.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_off00006226.bin
7b4f6bd6038188587dab7362cabe38e89a0c206b536a88345ea9e57794b497be
pdf-font-stream PDF embedded font (sfnt) at offset 0x6226 5284 bytes
font_01_sfnt_off00007431.bin
8fe97d53934c3c1d01a660f2e08d77c529b67629027c5af6380bf82be8aca296
pdf-font-stream PDF embedded font (sfnt) at offset 0x7431 10332 bytes