Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1da220974d85fe…

MALICIOUS

PDF

43.8 KB Created: 2020-10-27 09:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 62f66a99dfc7d9851192eb4cdb8dc617 SHA-1: 671ba35a080e8404f0355319683ecc9152f1e79a SHA-256: 9a1da220974d85fe95499d55485c1ee6432b198c9f68992d5c666c6be12152b7
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to a redirector service, indicating an attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated, but the presence of the URL and the link farm heuristic strongly suggest a phishing or malicious redirection scheme.

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://gettraff.ru/wb?keyword=non%20routine%20problems%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f8cf4461ec53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5f93b1b6a1640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8715c48a279.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/832229b0.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/jukesuxabaru_momigagu_popubo_niwetenagoguli.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/fafusimadila_bewekuseb_zotudefubitos.pdfIn PDF document text
    • https://letalisukom.weebly.com/uploads/1/3/4/3/134316231/eddd94.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/zolomoxuvewil.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/bubobaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3132/6631/files/94817292933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8979/8321/files/cara_setting_pubg_mobile_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3050/9254/files/20833063130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7597/4821/files/96905810647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2826ed6-9045-4790-b741-d0f6e9b27f48/63585575920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c10439-a939-4bca-9f9a-2e2bc8e36ad1/rikijutemiguro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1db6a2b-f23c-45d7-a85e-2bc8dca8d9ea/ligorubevuwopimepabonuxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91665c5b-6148-44df-8c4c-ae0c685bc45d/nudopajubuxuzosojeweluda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941b3aca-6cb1-4b92-b5f4-5f15b88be37b/69998801316.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/87580498338.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/edital_prf_2013_filetype.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 5088 bytes
SHA-256: a72883f87c9fc1f4f748f96a1a7f36d2fadf7913cba30e8f7c7ff218204b2b74
font_01_sfnt_off00007d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D10 11248 bytes
SHA-256: cc54a25693c78df1c469eab5eab313e645a2a651d2dc7e200277a3553231d8f2

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