Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35798ae24ab274a…

MALICIOUS

PDF

51.5 KB Created: 2020-10-28 19:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d41f7301b6befb14e12be4dedad8155 SHA-1: 74d42bcf4e4e064b9a4c4b6eb2744fc898b023aa SHA-256: c35798ae24ab274aeb9cb530e94e0c4aad0df13633b46ba95a8f3332ad5da7a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malware. The ML classifier strongly supports the malicious nature of this PDF.

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.me/123?keyword=titus+groan+pdf+espa%25C3%25B1ol
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/dofimerove-lebezugi.pdf
    • https://tefimapotile.weebly.com/uploads/1/3/4/3/134351392/wedonofufovome_megudoju.pdf
    • https://baresifesej.weebly.com/uploads/1/3/4/1/134131831/nepogum-fubenazemi-rokete.pdf
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f8eb6725287e.pdf
    • https://cdn-cms.f-static.net/uploads/4403937/normal_5f91615e382e9.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pefepo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/87508abf-4b01-4978-a925-eb5e978f93a8/xovozekek.pdf
    • https://s3.amazonaws.com/daselex/nofuragi.pdf
    • https://s3.amazonaws.com/donake/8085_microprocessor_architecture_in_hindi.pdf
    • https://s3.amazonaws.com/penefelomiju/47000733344.pdf
    • https://s3.amazonaws.com/buxoparadazegu/lugexiteketajibana.pdf
    • https://uploads.strikinglycdn.com/files/ed09bcda-ad4e-4b77-af2e-78b093dff092/4028039339.pdf
    • https://cdn.shopify.com/s/files/1/0485/7797/0341/files/niselanekopaduxisun.pdf
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/garedosap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5634/0890/files/pemedoxijorimumi.pdf
    • https://s3.amazonaws.com/purawuma/paromugegatumokefowivoged.pdf
    • https://cdn.shopify.com/s/files/1/0266/8789/7787/files/55680515406.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/likitawalom.pdf
    • https://s3.amazonaws.com/lixasifasi/c_n_ratio.pdf
    • https://s3.amazonaws.com/fasanag/10123270174.pdf
    • https://s3.amazonaws.com/dobesogum/employment_news_jobriya.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d63.bin
66a46ad9a4fa7714af1730347f792d0e9ea82d605bf033f92808f554a3e5969d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D63 5368 bytes
font_01_sfnt_off00008f6e.bin
72aef583c46636eadd51966911d1f44531c4eb92524ec1790a40bb10197ba834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6E 2700 bytes
font_02_sfnt_off00009aee.bin
344e5b6e729828146cb45a91994c4a2310a06d2f74db8e660083446fdaa061e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AEE 10880 bytes

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