Malicious PDF — malware analysis report

Static analysis result for SHA-256 2843c64de890cb6d…

MALICIOUS

PDF

71.6 KB Created: 2020-12-23 19:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a75dd6076ad649d6f8324f04658b0539 SHA-1: 4b31b9c2cc86e824f1c8362616f80087ee9e4b55 SHA-256: 2843c64de890cb6d8e593ca8fb05a0b67f4fd478b954065cd894963e02ca9c2e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm designed for SEO manipulation. The primary redirector URL is https://traffking.ru/strik?utm_term=battery+pack+for+indoor+christmas+lights, which is likely used to distribute further malicious content or lead to phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://traffking.ru/strik?utm_term=battery+pack+for+indoor+christmas+lights In PDF document text
    • https://duxepanakotijek.weebly.com/uploads/1/3/4/3/134340233/4fada3e8c428.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/gzhe4ic/moon_patrol_video_game_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407102/normal_5f9e8720acda3.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/RJcCBks/pixel_zombie_frontier_hack_apk_download.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/5682081.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidaxiwuk/Ao8iagh/automation_machine_builder_salary.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/wiremeresegikon/jirurukeja.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/39874096645.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/baby_shower_nia_ideas_manualidades.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/bavetetiroru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7294b36b-bf80-4d3e-a24e-5924249b819f/murray_state_mygate_help_desk.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/tuxuxufezigalat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3224d2e-60ba-48e1-950e-43d81e95c39f/dikugizovazirukizuku.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_off0000d8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A9 5784 bytes
SHA-256: 7ffc2d11a9a3a9ff1f8b95e8cf7e721c95cd6b9f6191e64a3db8dbf5131203df
font_01_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 11132 bytes
SHA-256: 60705e7061f4ee500a78fc1622f02ba8ed60cb72fdb74a5c99ff76d2b500265c

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