Malicious PDF — malware analysis report

Static analysis result for SHA-256 985b0689e84d72ee…

MALICIOUS

PDF

42.9 KB Created: 2020-10-08 03:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ea1c9459fb3c445792b3b72bd54fb519 SHA-1: 956be1a07125bea672400dbb4a9fb206b2ed6c5e SHA-256: 985b0689e84d72ee499321e17a73229df62b4a29def902e8faa4f61d53cbfa2f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at https://ggtraff.ru/strik?keyword=que+es+el+enlace+glucosidico. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to harmful content.

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://ggtraff.ru/strik?keyword=que+es+el+enlace+glucosidico In PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/10983361262.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/radarafipam.pdfIn PDF document text
    • https://site-1037121.mozfiles.com/files/1037121/winow.pdfIn PDF document text
    • https://site-1037230.mozfiles.com/files/1037230/48782984160.pdfIn PDF document text
    • https://site-1038337.mozfiles.com/files/1038337/doxarivudumupavanet.pdfIn PDF document text
    • https://site-1036649.mozfiles.com/files/1036649/9306523319.pdfIn PDF document text
    • https://site-1036702.mozfiles.com/files/1036702/sumuvosetuvupum.pdfIn PDF document text
    • http://files.thesonsetmefree.com/uploads/1/3/1/4/131414134/zapir_remufugilore_timituxobato.pdfIn PDF document text
    • http://files.leapsandboundspt.net/uploads/1/3/1/6/131606758/sokebenaf.pdfIn PDF document text
    • http://dapereraj.chumsofanarchy.com/uploads/1/3/1/4/131407492/7542414.pdfIn PDF document text
    • http://gefegu.poweroftheflowers.com/uploads/1/3/0/7/130775971/kexokusi-fotoripitapoxu-burunelifo-sisubale.pdfIn PDF document text
    • http://files.scrap-eechickdesigns.com/uploads/1/3/0/7/130739719/5708155.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/1/0484/0551/2349/files/39436879297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4159/4266/files/95622682417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/9691574739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7991/5937/files/19939072463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/skyrim_ps4_mod_load_order_2019.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_off0000657c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657C 5072 bytes
SHA-256: eca282f7f325db7125f63f2772c2feaa3792b9f82ae4aa9601952209fa342437
font_01_sfnt_off000076ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CA 12160 bytes
SHA-256: 8f4d5d944cad0b3d7368eec78f78e36004da8da4934d2b410a0f61242b522441

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