Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cda9341d448ed4…

MALICIOUS

PDF

42.1 KB Created: 2020-10-30 00:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2f7597baee6ea0535cfa0a1e29ed2a64 SHA-1: 734425df8c8a30a16b3d0ae9ddfd526c4f3e7de4 SHA-256: 74cda9341d448ed4b55680ab7330cc4653ad1d14a81de091ab451e849695e26e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a seemingly benign search query. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the presence of embedded URLs and the ML flagging point to a phishing or redirection attack.

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.link/123?keyword=dill+pickle+pasta+salad+today+show In PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/xapoz_javifawovuvopug_mabapegisotoj_joxazopole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8b7bbc77f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f92a38659718.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/4303443.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/zaxulaxavurare.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/fezenur/jabilomulofavutox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cf8440-ffd5-4e91-9475-5b311955d2dc/whirlpool_wfc7500vw_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b4a51f-65c8-47f6-90b0-947adc111340/mijisaxipobi.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/blue_water_grill_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae6a526-c137-4a11-b1dc-ba2c0aed1f93/37343775916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480b817c-8adb-4c54-a2dc-16875e5bbbdf/gukun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6ed0f3-9fae-49b5-8b76-d826b934202e/anti_saloon_league_apush.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bfdd12-ce80-46f3-81fe-82b050a6b8c6/32709699447.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/50772876101.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/42514007913.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/amortissement_dgressif_maroc.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_off000063ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 5324 bytes
SHA-256: 784e4504975d0eff438937e720608826f3e9c983d0f47c568c8db9d006bb0a6d
font_01_sfnt_off000075e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 11456 bytes
SHA-256: d9f9a01456a1258cfc5289d8ffbd1e9a790d89d516e01f52a2a6da78b6d9ed11

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