Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8128f005f2cb1ae…

MALICIOUS

PDF

57.7 KB Created: 2020-10-31 11:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 220db96f37781df52aa599763a9a9e75 SHA-1: d42e287b7352132e3db6ddc535a0ab2ac9f222a8 SHA-256: e8128f005f2cb1ae82ae56ec2653245c4a18d0d96e6a98dfc23629dc82034d1d
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as an online training opportunity. The heuristic firings indicate the PDF is designed as a lure, potentially for phishing or to download further malware. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?keyword=certified+authorization+professional+online+training In PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/db38ff4391e1eff.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/1341437.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/bulaxewawog.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/1/0440/8714/8696/files/samsung_gear_vr_oculus_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5248/9624/files/31974512343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0475/4348/4582/files/7999491169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088a4a46-7480-4733-a6b9-5e910bc6b097/team_sonic_racing_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8446/2274/files/febefinipuxavovenapajibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256413dd-ee0e-4b56-99e7-3f02544415de/mayfield_paper_company_san_angelo_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4339/4974/files/91712593401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4309/2157/files/dovokewakitajipoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7741/4293/files/bacterias_utilizadas_en_la_industria_alimentaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2520/9256/files/17266994409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6820/9307/files/nisofaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/jackass_stream_serie.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_off0000a041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA041 5256 bytes
SHA-256: 9d64d73d05711657882c8c947ef6c78d0ae5224be2ef832631645c9b6f061baa
font_01_sfnt_off0000b225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB225 11516 bytes
SHA-256: 3a3b47a6125f8cebd21b2ab96f4f6ba7debb7e25d6b61c532392aa934c272c0c

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