Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b484b69ea37147…

MALICIOUS

PDF

45.2 KB Created: 2020-11-02 21:14:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0d4f598032d0d9e1fe9f9c6d9ab2f28d SHA-1: d24d60b40f35879eacde0ca05a513550d66acd6b SHA-256: 45b484b69ea3714784f0d331ecce330364a358b5723512af2bcbbd4f6e97ccbe
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=calculus+early+transcendentals+pdf+11th In PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/b55817.pdfIn PDF document text
    • https://kolerekum.weebly.com/uploads/1/3/4/3/134350376/zetonolabuxu-kumita-ritopuzamadi-xupinigumaped.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5f8c4c75a29f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f9636df9fc33.pdfIn PDF document text
    • https://bupaduzisi.weebly.com/uploads/1/3/4/4/134475958/7e5712534d473.pdfIn PDF document text
    • https://sukevimekixav.weebly.com/uploads/1/3/4/5/134599702/390379.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/56604a743d0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/17050423-83a1-456a-92d9-4a7a03929746/download_subway_surfers_mod_apk_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0800/7064/files/lugazodesisumus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a57bdc-1d47-43cf-9058-24cf1f7925d4/tedud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fff468-36e6-48ad-af9e-3ef4fc9e12ff/36063436937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838c6ff0-11d8-46fb-a534-7d7eb6ea08cd/56867539035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4475/1528/files/chipset_gta_5_apk_e_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cee8ac-485b-4d31-9c13-66bcfaeaf8ba/1137565221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bebb4a-a9c2-418a-a79f-875b59bc79cb/analytical_figure_drawing.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 5144 bytes
SHA-256: de8641109e72292b7633e6de0f3a5830642a2ef386176c71215a7c3582b9392a
font_01_sfnt_off00007419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7419 11248 bytes
SHA-256: f4b4547a08cb126099239546e67fdfe3c5ed749bdd8d33ba97a1048ced0c3641
font_02_sfnt_off000099eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99EB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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