Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdd19c9cb85b42d…

MALICIOUS

PDF

43.2 KB Created: 2020-10-09 08:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c86e44945a53c937bd522824613a64b4 SHA-1: 698b9db3057b3280d097075bbd9aea5def7e121b SHA-256: bcdd19c9cb85b42d10f3e859702cdb4d8c8820703f68886cd26c42fea964884c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, many of which point to a link farm designed to appear as legitimate content. One critical heuristic identified a link to a known malicious redirector, 'ttraff.club', which is likely intended to lead users to malicious content. The document body, though heavily obfuscated, contains the same malicious URL and references to book titles, suggesting a lure to trick users into clicking the malicious link.

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://ttraff.club/pify?keyword=kiss+kiss+roald+dahl+pdf In 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/1/0431/1685/5457/files/52036382164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8835/1910/files/98835336704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8795/6641/files/73753992116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e41761c-787d-41a5-a751-17ef2d85013a/savaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7676494-6224-493c-b774-d60dad2c258e/53806314570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda330ec-fa96-452d-8f16-b553df581804/zozuxudojewibawepumur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7b6aad-392e-4a3b-8e4d-b1dc5d4047fa/87481171333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/survivor_season_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/rexovakanirutatememapasug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/255_60r15_bf_goodrich.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8326/2869/files/huston_smith_world_religions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0217/0008/files/fevegedoliwopanofu.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_off00006bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF1 5160 bytes
SHA-256: 222f3eaea0769618200c07ce20e238f3f0e8c28923939b676c05596747033619
font_01_sfnt_off00007d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D78 10024 bytes
SHA-256: 98a057db0dfc39c8bbacf0cad5fc7ed680df27000e5bed3cc5e2b85b1e6f19d4

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