Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7744bd895d51b7…

MALICIOUS

PDF

40.9 KB Created: 2020-10-30 11:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 355bf2f2c03d7953ba14e189359c155d SHA-1: 4eab9cca03bd88284e4eaadb0fd14fb036484b71 SHA-256: 5e7744bd895d51b782b16fe39c4f2ec16b5b6af411887a9873166b08a7f72707
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting a phishing or scam attempt. The primary malicious URL identified is https://ttraff.me/pify?keyword=double+replacement+reactions+worksheet+%25235, which is linked from the document body and also flagged by heuristics. The ML classifier strongly supports the malicious verdict.

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.me/pify?keyword=double+replacement+reactions+worksheet+%25235 In PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/3549770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417024/normal_5f959ff9d5e3d.pdfIn PDF document text
    • https://sepubipig.weebly.com/uploads/1/3/4/4/134445985/6658820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5f8ea3c1c1224.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/1418157.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2446307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f922e68aa268.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/857d6708-d96f-4956-a53e-ee3b27221be5/gezanix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90f3cd6-32a3-4ee5-b4c4-68a8283bedd6/12727653790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d07d9a3-2a8d-4db6-8a39-6a0185577d67/60814383080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225376e4-990e-4996-9b11-7a39d33249a9/36694962463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f585947c-b4c5-4f83-a240-391e5f50d4f3/2019_dodge_challenger_hellcat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3fbe522-6406-459b-affa-8e032b36d36e/24908615541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5245f0b6-02b6-4c49-91b7-aa87298d0e42/stuart_the_minion_quotes.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_off00006014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5468 bytes
SHA-256: 1b691253f46237116963d54cf09e2d8147d0a821bf7db3870f3d13965492dac4
font_01_sfnt_off0000728f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728F 10400 bytes
SHA-256: 5362b38b7e271ecaa2d94ffc5503a18dde932a3978c1760a34e97ff4905cbfa9

Open this report in the interactive analyzer, or submit your own file for analysis.