Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fc61ac4050793d…

MALICIOUS

PDF

49.4 KB Created: 2020-11-02 22:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aa8d56d3fbc38b668d9b39ebc288a4a6 SHA-1: 91c7fd42016617fe33a756aa62cedef9d96a0005 SHA-256: 49fc61ac4050793d63a6731e5d3df5d941542042f8a5f4fd80187359bb508634
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically the URL https://ttraff.com/123?keyword=pso2+force+guide+2020. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, suggesting an attempt to drive traffic to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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.com/123?keyword=pso2+force+guide+2020 In PDF document text
    • https://sefuzogesosemo.weebly.com/uploads/1/3/4/5/134579576/c2dfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f87224b49375.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/831ca38cea.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/novenebegejowiz_guzovaduluji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_5f945d545efb2.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/wuvupawapil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f8e32720024b.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/suximawo/letterschool_full_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/biomes_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/india_cabinet_ministers_list_2019_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/area_of_a_circle_practice_aaa_math.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/jones_meat_market_climax_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/logavanavofuwibapika.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_off00008124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 5224 bytes
SHA-256: 3e9d7ce8e20be054e7359cf53e55af8a31a827d4d991aa33affa76595cf964ae
font_01_sfnt_off00009303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9303 11148 bytes
SHA-256: 578955098a22189b74ac58abf1ae3acf61e57adaf172e82e0c77053b6b54a25b

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