Malicious PDF — malware analysis report

Static analysis result for SHA-256 745ba11cffd93fcc…

MALICIOUS

PDF

61.4 KB Created: 2020-10-26 18:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4265f3a9c36ef021fcec86e4a60de597 SHA-1: 90b9c5747c46ef121709db35693d73c3170d091e SHA-256: 745ba11cffd93fccf666b72a278f3fa9f1b8829b2a02336b7c0a1187d1b2d86b
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, many pointing to disposable hosting. One critical heuristic identified links to known malicious redirector infrastructure. The document body contains obfuscated text and URLs, suggesting an attempt to disguise its malicious intent, likely related to SEO manipulation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.cc/pify?keyword=smakoterapia+iwona+zasuwa+pdf In PDF document text
    • https://vajibenutiw.weebly.com/uploads/1/3/4/4/134487234/9953558.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5011088.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/zodadomin.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/e745b0dc240a0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8b06e5bde44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f8a1afbec0d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5f8894c709f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5f8febb943d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f8fe84b8d6b1.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/706058b3c.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/3713688.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/dovigesugiboje.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/nanafomizanonudisu.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/67c49570b89.pdfIn 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/99f64af2-459f-440a-878d-6638d53e31d8/tofotologikamasipevopade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af96ef5-5f16-4e24-b182-df532ef0a506/47004302775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73cf618d-ca39-4812-992e-d84492e6b285/miluvafofiwumekewatot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65af9da8-cb2a-4ba7-a13b-08b1af34e4f2/jasitabukodobapodotupuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de276672-b2a3-4d67-b708-961edc085a6e/51215135649.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/business_law_for_ca_foundation.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/lp_meningoencephalitis_tb.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/algebraic_geometry_gathmann.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000c6f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC6F5 19240 bytes
SHA-256: fa539907e65b87b90595b834acc8e884083940d0b6bf5b7e7f8bfbedd342ec26
font_00_sfnt_off00007f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F12 5464 bytes
SHA-256: ac7428a19de964c13f93d429c5f95510ba664e55871f515f0e59a4064baa7407
font_01_sfnt_off0000919d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x919D 3048 bytes
SHA-256: f011bd79668b01040793dacc2ddcbdac2af478c7c864f38c58e8a46d56677029
font_02_sfnt_off00009dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD0 13076 bytes
SHA-256: 4f5fcb8fc9ab8df5dca45db700d6f71618959524b5226fce520ccac5d4ebd8a1