Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fba7cb0c39e7a5f…

MALICIOUS

PDF

44.0 KB Created: 2020-10-28 22:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e738a34cc12991d0153033cece4aeb36 SHA-1: 4443cf987d94bff1e611bb644041623b954421b2 SHA-256: 5fba7cb0c39e7a5f72f977dfa8969d5a091482bcc6e03c5db67921916bb56035
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many of which are SEO-optimized to appear as legitimate documents. One of these links, 'https://ttraff.cc/pify?keyword=mckamey+manor+waiver+legal', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains the same malicious URL, suggesting an attempt to drive traffic to potentially harmful sites.

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.cc/pify?keyword=mckamey+manor+waiver+legal In PDF document text
    • https://woxomeze.weebly.com/uploads/1/3/4/4/134498023/bf4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5f8ea4ac22099.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zijero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f8f49cfb18de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f8abfb17cf28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5f97795b994eb.pdfIn PDF document text
    • https://xufuluzigi.weebly.com/uploads/1/3/4/2/134266078/fefe44c9368.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/xesamixajufatet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f91be0e481a3.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/xuratita.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/tekujel/buggy_bath_car_wash_evansville_in.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/approximation_bankers_adda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3584/2498/files/hyde_park_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5795/0119/files/certificate_of_ordination.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/33121878974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476aeba7-df1d-4b41-a8e3-216a77d62183/43055322901.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/67823742578.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/61383083289.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/crossfit_workout_log_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/30611947213.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_off00006ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA8 5264 bytes
SHA-256: d60178a9dd43f8222784c87bcb505b89997af85e892111271a985dbc2ea0ea28
font_01_sfnt_off00007eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAC 10448 bytes
SHA-256: 76559f07acd71bfec2ad5dd5df38b96c2d9c5d595b90c78ef6d9f53771dbb239

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