Malicious PDF — malware analysis report

Static analysis result for SHA-256 370979990d69dce1…

MALICIOUS

PDF

45.7 KB Created: 2020-10-30 18:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 722b0ab14d969e7d3ad3623e36dab45b SHA-1: 4e49f90dbdd43dce92ab530b37789fdb2e21d67c SHA-256: 370979990d69dce1bd1189c91e21e06894007bbd182a5c03d9f559533ab70768
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/123?keyword=schizm+mysterious+journey+dvd'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery. The presence of many other PDF links, some benign and some unknown, indicates a link farm strategy. No scripts were extracted, but the PDF structure and malicious links strongly indicate 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?keyword=schizm+mysterious+journey+dvd In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_5f97c32c1e58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f873981de8b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_5f99f5cbd62a7.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/1/0496/8631/5167/files/100_examples_of_homonyms_with_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8e7f2f-a1b4-4c68-be87-a3b834126ff3/widexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4522/2062/files/cisco_room_kit_mini_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cbc00f4-edf9-44a2-9d1f-ccdb3dde9efd/12596799411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0390/3652/files/50873259396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8353/3988/files/yukon_middle_school_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355f76e0-63a2-4c91-8e7d-ee0ec5819b76/lamibaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8568/4632/files/65173405481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6502/4416/files/activity_navigation_animation_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/846c2b1d-f054-41b9-9999-c5253841d7d8/82486134990.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 1

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_off00007397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7397 5328 bytes
SHA-256: 27ab9c6cb4e39a625ff3c2b0d8ba11c2fd31c0da24df09dd0baf0d6dccf0dcad
font_01_sfnt_off000085a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A9 10664 bytes
SHA-256: 433264d5cf8a2c49cbe44c176ccd7c8dff484721d2319cab679af46a8fd5b714

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