Malicious PDF — malware analysis report

Static analysis result for SHA-256 791dab14cefdb0dd…

MALICIOUS

PDF

137.8 KB Created: 2020-10-28 03:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd052680babf69b63893aa3ae15ce0e SHA-1: 723d919fe37a2623a3d9904071371d815e72641c SHA-256: 791dab14cefdb0ddcc5f05aa37be50b91b823a834539faa94923b7ae91bf4487
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is a strong indicator of malicious intent. The heuristic PDF_SEO_LINK_FARM also indicates a large number of outbound links, suggesting a link farm used for SEO manipulation or to host further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded link suggest it's designed to redirect users to potentially harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=george+harrison+children
    • https://sovopubi.weebly.com/uploads/1/3/0/7/130775052/4317839.pdf
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/5d4de1.pdf
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/tupebisupe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bupijila/sarakez.pdf
    • https://s3.amazonaws.com/mijedusovineti/98600752720.pdf
    • https://s3.amazonaws.com/nawosineromigi/libokesejugivejapeb.pdf
    • https://s3.amazonaws.com/fekaduvopigab/13315627148.pdf
    • https://uploads.strikinglycdn.com/files/607ff19e-0e5c-47f4-9c9b-e7f83ba6156e/zapufudepu.pdf
    • https://uploads.strikinglycdn.com/files/82ba94d5-ff32-4712-9740-65c2e13baf8f/90490349282.pdf
    • https://uploads.strikinglycdn.com/files/5bd3be53-14ef-4112-a0ac-5268b75568a2/livafedad.pdf
    • https://uploads.strikinglycdn.com/files/7d005739-3100-431d-ad4d-f620624d056b/nearest_airport_to_thomasville_ga.pdf
    • https://uploads.strikinglycdn.com/files/3367cee2-1bd5-4e98-8674-9d6d427da52a/11415652680.pdf
    • https://cdn.shopify.com/s/files/1/0470/6140/1768/files/pusiz.pdf
    • https://cdn.shopify.com/s/files/1/0500/9470/2763/files/12737784407.pdf
    • https://cdn.shopify.com/s/files/1/0498/7276/5083/files/zegit.pdf
    • https://cdn.shopify.com/s/files/1/0482/4075/4840/files/36750142318.pdf
    • https://cdn.shopify.com/s/files/1/0266/8688/1985/files/revelonixas.pdf
    • https://s3.amazonaws.com/sitok/calculus_3_lecture_notes.pdf
    • https://s3.amazonaws.com/fajixe/linukofepabobafilawepira.pdf
    • https://s3.amazonaws.com/lewuli/bepiseropubipulamag.pdf
    • https://uploads.strikinglycdn.com/files/4b2347f2-56cd-4f85-af6b-a55b82c45a1e/diablo_3_beginner_guide_2019.pdf
    • https://uploads.strikinglycdn.com/files/495d1089-e105-422c-ac98-e82c9e965072/the_physics_of_wall_street.pdf
    • https://uploads.strikinglycdn.com/files/1e900024-42df-4b38-bbc9-8f71c25e3515/32093717268.pdf
    • https://uploads.strikinglycdn.com/files/0d5defa2-2e6e-4ce5-8030-c724483a5d8b/papusoputufulojesotapiweb.pdf
    • https://uploads.strikinglycdn.com/files/8ccf2adb-7819-4a40-bf41-3c370beae7ae/mikawovuvejikiwuj.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_off0001dd0e.bin
7bfffd7d3189753b3caaac25bcbb4763c10a0e21fa897149af89b0792c5918ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD0E 5232 bytes
font_01_sfnt_off0001eed6.bin
a3893499904b47bcce258ec8b31fb00f104d5d9da5bd1a9f72c9a41900938d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EED6 13360 bytes

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