Malicious PDF — malware analysis report

Static analysis result for SHA-256 917efbb2a081f945…

MALICIOUS

PDF

97.7 KB Created: 2020-11-01 08:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 201955852e77e674e569a858466be303 SHA-1: 96a4edc0e438f23b63c89fc5d9cece9c306c816b SHA-256: 917efbb2a081f945eb1db1fa3273fbd745185a393a529a28c9e1eeffbca0ee8c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, https://gettraff.ru/aws?keyword=wedgewood+vision+rv+oven+manual, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL, suggesting a lure to a malicious site. The presence of numerous other PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious 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://gettraff.ru/aws?keyword=wedgewood+vision+rv+oven+manual In PDF document text
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/kipolodupa.pdfIn PDF document text
    • https://vumusubivabup.weebly.com/uploads/1/3/4/4/134491869/48321.pdfIn PDF document text
    • https://tazejoga.weebly.com/uploads/1/3/1/3/131383942/sogejaxini.pdfIn PDF document text
    • https://labajilawuja.weebly.com/uploads/1/3/1/4/131406369/nodepepejage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/tool_fear_inoculum_vinyl_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/is_the_center_of_mass_of_the_dumbbell_in_the_figurefigure_1_at_point_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34487aec-0d03-4041-a8cc-d6bbbc7680f6/what_episode_does_asuma_die.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e18a3c-fa5f-4943-a434-1b3cf2eaa43d/gasukuxuxowezonovalokog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2707c1-642a-425e-8cc1-8ceaa458080a/58390464057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce36a921-851c-4a42-a025-e6f4e0369f9e/93241885605.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/tilapia_fish_farming_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1328/2213/files/lutijoxeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0462/4548/files/spearfishing_wetsuit_thickness_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/wasibadokedisoxat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cbf14e-cbf2-4656-bc16-a6a2ded4c46e/rodevivove.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001220d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1220D 5308 bytes
SHA-256: 6020115e7df1c8050fe207e66d108032790443403b0e0b922c490e267bdd6afa
font_01_sfnt_off0001341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341C 13656 bytes
SHA-256: 23c033e97978bc1eee3ed20df957064cd89ddd79c4f5376f8a0541dee393f221
font_02_sfnt_off00015fc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC5 16796 bytes
SHA-256: 65f378dac406c3614d467b15d0b750b22c0c90e58f197f3d689ae96ba61300a8

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