Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3fd332658d353e1…

MALICIOUS

PDF

44.3 KB Created: 2020-10-31 04:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 474ab20366c6d6762dc69220914671d3 SHA-1: 34325e311fb74eee9cf10ae2f1e99470aeb4a765 SHA-256: b3fd332658d353e1bb196cd817bc56392e0b8b5e24e2dfaaa61774bdbbadbef1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically `ttraff.ru`. The ML classifier also strongly indicated maliciousness. The primary attack pattern observed is the redirection to a potentially harmful URL, which is a common tactic for phishing or malware delivery. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/123?keyword=cuisinart+smartpower+premier+blender+parts In PDF document text
    • https://vixepakezo.weebly.com/uploads/1/3/4/4/134447938/melonizipil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f995a02716bf.pdfIn PDF document text
    • https://fupesovuzej.weebly.com/uploads/1/3/4/0/134016868/farij.pdfIn PDF document text
    • https://gepagalegizexu.weebly.com/uploads/1/3/4/4/134478943/f30ef62624eae49.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/lorurotupeguvivebag.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/rupifetigut.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://s3.amazonaws.com/takeju/pathfinder_kingmaker_beneath_the_stolen_lands_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/bomunuxevix.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/gerir.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/99113121169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c64d919-b3ea-424c-8eba-ed8f297077fd/48634410635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3141/3415/files/dbs_update_service_employer_guide_-_gov.uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/dry_training_for_freediving.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/vafakujev.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/11393282480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/proc_surveyselect_sas_enterprise_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 5244 bytes
SHA-256: e45f35c9ec6c3334c38d58822819170ed52a090c96dcc718cc14141ce5f6f338
font_01_sfnt_off00007266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 10312 bytes
SHA-256: 7b8b411dfa7fdf85739f7030ee5aa53d9fa778002a4a1acaeec8e0c5c88deded
font_02_sfnt_off000095c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C5 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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