Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df4ffeced6decbc…

MALICIOUS

PDF

43.3 KB Created: 2020-10-27 16:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b67bab06e2e7b6161ca285af3d653443 SHA-1: 9ceac81cd2c9c38c3094014d6315837edce8bd93 SHA-256: 0df4ffeced6decbc4c5b7a2d100b7fa05e9f14b4a6ffe9e58a7a925648a91f9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to external sites, potentially for phishing or to host further malicious content.

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.ru/pify?keyword=wild+blue+country+band In PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/sitovowor-novage-sibaxamu-dapinuk.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/juwawekena-vivibepiselu.pdfIn PDF document text
    • https://gutugifowofe.weebly.com/uploads/1/3/1/6/131606479/64d63116e5de221.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/3cb8123f33c700d.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/efcec58f.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/zepesibajekafa.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/5835976.pdfIn PDF document text
    • https://lagafuxomip.weebly.com/uploads/1/3/4/3/134347440/fupun.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/mesotodimus/pitazatinodisefonez.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/51699636565.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/3d_maker_online.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/boxerupimiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2162/2184/files/24843114433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4865/5806/files/97310354336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/kabbalah_hermtica_marcelo_del_debbio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8036/6745/files/47131752238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/root_cleaner_apk_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0924/files/24681410936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2795/3312/files/82388681914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2351/3755/files/kilasopoleno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9854/5562/files/taxazekafusimupotilodoj.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_off00006a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4F 5008 bytes
SHA-256: b1382f47c29c99cff6ee68bed13c8f0269be2075e080599322b4fe09e0d6a4f0
font_01_sfnt_off00007b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6E 10836 bytes
SHA-256: 55e79689263705c0ddcfac68f13c230f7d75aa81399e20f62f7d01452770c60b

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