Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aafad54179ef4dc…

MALICIOUS

PDF

45.2 KB Created: 2020-10-25 19:45:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: af08a32222e702e84553f9d53a91653e SHA-1: 7de5038dccbd6a775c08d94035b15dd5c421dfc8 SHA-256: 8aafad54179ef4dc1fcb70ac2cd7f99024f4125050a4b1fb4e26c28cd58c9050
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, includes the text 'Improve your self esteem pdf' and a URL that aligns with the malicious redirector finding. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, likely to obscure the malicious destination.

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/aws?keyword=improve+your+self+esteem+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce9c2fa-cd90-49f3-906e-27978707bac5/60165531399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fd663e-bc97-4441-807b-2d005154a60f/nuvenugajenomiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2e1c2ae-9516-4b34-87c8-60d0f1ebe123/wudisodetikavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1fb985-654f-4c1e-baf0-feb6d3ea4e04/gemefetukumizufexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1392/9630/files/70124702215.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/98611200388.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/triple_bottom_line.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/bestiario_hp_lovecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3710/4577/files/membrana_plasmatica_resumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/2020_nissan_versa_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2392/6949/files/abnormal_psychology_an_integrative_approach_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/hypersonic_glide_vehicle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6157/5834/files/clash_of_clans_download_hack_apk_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9231/1206/files/personajes_importantes_de_mexico_fallecidos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8135/5430/files/vessel_finder_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7650/0638/files/dnd_beyond_character_creator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8712/5910/files/89252526251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1688/6678/files/audiocodes_mediant_500l_configuration_guide.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_off000073f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5076 bytes
SHA-256: e1db71f43038fb677dbd6407f98aa6e2157ceb86ff8f061958b225942bd3554a
font_01_sfnt_off00008531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8531 10080 bytes
SHA-256: 44630738a25333ed9d5dc927facf8e03b24cc0b7740d749ddab1f9ce4c2cd281

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