Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9eb6089f06c027f…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 00:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b2575470acffba34f72b88645574690 SHA-1: 02579c0fdb0d5e2366700ef01fa3fb5dcf4666a2 SHA-256: c9eb6089f06c027f22d8e8f110e406fab6c522cd0d638944a8a988073fb9d0b4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm infrastructure. The primary redirector URL is https://ttraff.cc/pify?keyword=java+tutorial+for+beginners+using+netbeans+pdf, which is designed to lead users to potentially malicious content. The document body, though heavily obfuscated, contains references to the redirector and other URLs hosted on Shopify, suggesting a lure to download further content.

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.cc/pify?keyword=java+tutorial+for+beginners+using+netbeans+pdf
    • http://files.excelfitnesscenter.net/uploads/1/3/1/3/131380397/d240c41f9c9ca44.pdf
    • http://lifavakif.laurablatterman.com/uploads/1/3/0/7/130775971/kunusigidu-xokivuvut-panuwutabo-xowobawomam.pdf
    • http://files.casapba.org/uploads/1/3/1/3/131379213/fe2865a349.pdf
    • http://senija.shannontkd.com/uploads/1/3/1/4/131406149/limibesiponug.pdf
    • http://files.dukeladyblue.com/uploads/1/3/0/7/130775131/zisexiloterewej-pizuw-meganos-luvularo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/39861893260.pdf
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/65816025905.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/sinajametugiseto.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5303/files/32594640646.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/17640984698.pdf
    • https://cdn.shopify.com/s/files/1/0431/1924/7514/files/24389787002.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/kiranevozurubube.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/interacciones_medicamentosas_aines.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/bamakikuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6438/files/73336386538.pdf
    • https://cdn.shopify.com/s/files/1/0434/2546/4476/files/bias_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/1353/7951/files/sort_algorithm_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/gasajej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/5288361827.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006249.bin
cb7ddcb60d412194ed3ceb0d0fe72c1d5b0103a2be8a0fae9161efd5658b2add		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 5400 bytes
font_01_sfnt_off000074bc.bin
532e3027edc74cc582c64e8ac876803ba6cc824905ffcae2e4e545ec1de34f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BC 10164 bytes

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