Malicious PDF — malware analysis report

Static analysis result for SHA-256 752cf3f0ba2d14c0…

MALICIOUS

PDF

48.0 KB Created: 2020-08-24 02:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f03987d89d17b12d8aff632ceddae126 SHA-1: fe308e3522c4ccf3bc8849c457f94e7777b31a52 SHA-256: 752cf3f0ba2d14c0c7fe8ffdb80e1453f825530c5dca373a0e4bf7a15f11f3e3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, indicating an attempt to lure the user to a malicious site.

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=china+military+power+report+2017 In PDF document text
    • http://files.benevaanimalhospital.com/uploads/1/3/1/0/131070911/6334014.pdfIn PDF document text
    • http://jedogana.p2presources.com/uploads/1/3/1/6/131637309/4171606.pdfIn PDF document text
    • http://bumibezo.nejcrwc.com/uploads/1/3/0/7/130739235/kamikifo.pdfIn PDF document text
    • http://files.happysnapsstudio.com/uploads/1/3/0/8/130874526/lovufo-dafap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/gulezibetikewudinulapogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/varomejetaxaxixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/80549044023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/6578070237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/mivawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/32642258584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/apics_cscp_certified_supply_chain_professional_module_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/84626426752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/apastamba_grihya_sutra_sanskrit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7845/1351/files/vogef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/adrenal_medulla_hormones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/bobina_de_encendido_bosch.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cda.bin
ca188d4aea271d86d990c90e7ce35ce5756970738c8f9089d281166bc0dd9869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDA 5384 bytes
font_01_sfnt_off00008f18.bin
75ee992fa98f441a114e87a2b1634cfda3ce30723c3aa58219f422c25d098248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F18 10472 bytes

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