Malicious PDF — malware analysis report

Static analysis result for SHA-256 11172188cecc951b…

MALICIOUS

PDF

37.7 KB Created: 2020-10-30 14:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff6d11b08624cccdbfec7ed113be8624 SHA-1: 9239e09ab41938a33e3b2497daa0a64dbdb63225 SHA-256: 11172188cecc951bcde1dfbc5e5bb5a6512e6272e573ea7c17aad414e2214d64
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, embedding a large number of URLs that lead to potentially malicious redirectors or further malicious content. The document body contains a search query related to 'Skyrim crashes on startup xbox', which is likely a lure to make the embedded links appear relevant. The presence of a known malicious redirector URL and numerous links hosted on disposable domains strongly indicates a phishing or malware distribution attempt.

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://ttraff.club/pify?keyword=skyrim+crashes+on+startup+xbox In PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/nazedivojufa.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/vadewulusiter_jupezitejok_tuzadaru.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/26082b208.pdfIn PDF document text
    • https://kuvejepi.weebly.com/uploads/1/3/4/4/134452054/fafa7aebb6dd1.pdfIn PDF document text
    • https://bipinutafo.weebly.com/uploads/1/3/4/3/134358532/6176595.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/054201a.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/suxiweke/1003124729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/bowamerizatewewutes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7330/4239/files/57560794499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4486/1594/files/300_grams_to_cups_converter.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_off000053f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53F0 5616 bytes
SHA-256: e84acfa74fa8bbcaeedfbbe8910d001b1182eaba5473d79ca95c09a8f382326d
font_01_sfnt_off000066e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E7 10428 bytes
SHA-256: 41d3ba948f744bc50fc8c6fc22f3cce111037ee4591c0f544d910da89f089f6a

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