Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fd468020290bcf…

MALICIOUS

PDF

85.4 KB Created: 2020-10-01 06:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8197fac4b7506976e6f23c689fe0799c SHA-1: 759fe66723c5845ca7176fd5dd2e8555488ed3f6 SHA-256: 95fd468020290bcf65e1330cb6db757dcb93b32eefb36d284c600e664591dae2
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'cctraff.ru'. The document body, though heavily obfuscated, contains a URL that matches this malicious redirector. This suggests the document is designed to trick users into visiting a malicious site by presenting it as a search result for a popular ebook.

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://cctraff.ru/strik?keyword=campbell+biology+9th+edition+ebook+pdf In PDF document text
    • http://files.gunbarrelquiltersguild.org/uploads/1/3/1/8/131871462/wunaligadoxen.pdfIn PDF document text
    • http://files.wun-mma.org/uploads/1/3/0/7/130775350/votap-gojidujalogu-rareketuta-vulazisepopu.pdfIn PDF document text
    • http://rafilo.calgarypartybus.net/uploads/1/3/0/7/130738667/budisijuzig_pixunawuvozine_gisokuli_jixox.pdfIn PDF document text
    • http://neseve.bellcitypaving.ca/uploads/1/3/1/6/131606575/nukezev.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/lulofomazogipizexidibito.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/59273982176.pdfIn PDF document text
    • https://site-1037253.mozfiles.com/files/1037253/sawozidoxibitiwiwid.pdfIn PDF document text
    • https://site-1039271.mozfiles.com/files/1039271/47146585028.pdfIn PDF document text
    • https://site-1036923.mozfiles.com/files/1036923/49004380148.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/livro_epidemiologia_basica_bonita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1245/5591/files/alchemy_leveling_guide_wotlk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/todisikoxoxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6738/3716/files/pojezoxule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/whatsapp_status_video_song_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/bulejef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2621/1238/files/alternative_careers_in_science_leaving_the_ivory_tower.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/turalututedanawupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/68257374466.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 5456 bytes
SHA-256: 7cf342a88bd89f42e5983919ef8e044b48077df2d9de2ff64c5ec838a7fcbbdd
font_01_sfnt_off00011591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 10668 bytes
SHA-256: 5ef793b8b6eccc5f14cf33fa85bd4258a00cd15b1b7f05d3e3d0862dd918f9fc
font_02_sfnt_off000139bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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