Malicious PDF — malware analysis report

Static analysis result for SHA-256 493b46db008490b4…

MALICIOUS

PDF

39.2 KB Created: 2020-11-02 05:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 85056033913da852e46430a8f1fdab7e SHA-1: e442c066be2ad10ed78218cf16623a7b0b7baef4 SHA-256: 493b46db008490b430a09c35c7a62fe4f2b0b97e03b169363ece6791b937ecd4
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. One URL, 'https://gettraff.ru/aws?keyword=the+seven+decisions+pdf', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://gettraff.ru/aws?keyword=the+seven+decisions+pdf In PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/4880310.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/3460351.pdfIn PDF document text
    • https://tifedufuzitiji.weebly.com/uploads/1/3/4/3/134353288/446e1b.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/3200349.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/mirigikojogikelujej.pdfIn PDF document text
    • https://wugemevafiditi.weebly.com/uploads/1/3/4/3/134382928/siboradenixepeg-wofafipomujuse-jebaf-jomewazanefiniv.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/4564063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5f9a05c222f08.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/gexipesivus-zaxawigibixaluz-wadasat.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/688e1791141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5f9889ecb2b85.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/subud/63455365198.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/old_man_and_the_sea_question_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4e5e90-e346-4366-af05-b62b00885987/bunekifixonakufudonuno.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_off00005d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D55 4912 bytes
SHA-256: a340544f8d9b8aa5a2f92eee1cc2589a2fccc4e500b5db94259d2c045e1ba7e2
font_01_sfnt_off00006e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1B 9948 bytes
SHA-256: bd9772870a05799bf0cb5b9136e47b6952b0b3ca90f5996c4ed9447dcf41d481

Open this report in the interactive analyzer, or submit your own file for analysis.