Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa45206f7ad31e95…

MALICIOUS

PDF

41.1 KB Created: 2020-11-03 12:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 30225e51b4d0d5837f5fbac3b7c3d014 SHA-1: 36178910ab32db3eba0dff00cf0c1ec07f366d80 SHA-256: aa45206f7ad31e9548b409175f585788c8ede7fa73f4471e30cd8f6676ca98fa
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious due to its inclusion of a large number of external links, many of which point to redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/123?keyword=syd+field+screenplay+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/123?keyword=syd+field+screenplay+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5f91c2a8b9a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5f9458d6106b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f9c17f3544c1.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/7613128.pdfIn PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/fotevudubodobaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8c7fbb87dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_5f91d54772a21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f9cfae04c90b.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/6621859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1e731c-f3fe-43f8-ad4a-36ef8b137fb6/wezidevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3606d517-f7d8-42ba-acaf-a5e333ecc249/69748199174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e114068-efd9-4b09-9890-2fd2f849b709/nakinidusuzeguzekosuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dcc5d9b-322f-4662-8689-59c5d126d0ef/tv_guide_listings_kissimmee_fl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb76521-328d-4cc7-9c6d-f6dcdbd345cc/dead_poets_society_full_movie_free_d.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_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 5352 bytes
SHA-256: bd67b6d56a65119bf8e818cc6e74fb32d40fb40a0991efe369cf98bc38ccca43
font_01_sfnt_off000074ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74EC 10292 bytes
SHA-256: f8b9a1fce652a5620850a43fe1bfc297022e01a69d683b69075c7007e5177ea2

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