Malicious PDF — malware analysis report

Static analysis result for SHA-256 037e96748690d694…

MALICIOUS

PDF

45.6 KB Created: 2020-08-07 10:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a621eb74c9981924dd8d27ff174d744 SHA-1: c2e862cc660a61ba24f752e610c1d369215153d7 SHA-256: 037e96748690d694ddb3c7ba0400bea59805a469d9ff36ac0005cb68ea63d335
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link disguised as a syllabus that redirects to malicious infrastructure. This is a common social engineering tactic to trick users into downloading further malware or visiting phishing sites. The ML classifier strongly indicates maliciousness, and the presence of a redirector link confirms the intent to lead the user to a harmful destination.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=cds+2+ota+syllabus+2020+pdf
    • http://files.mcculleycuppan.com/uploads/1/3/0/7/130776887/vobawut.pdf
    • http://duvigija.klynnsmith.net/uploads/1/3/1/3/131398560/wadopided.pdf
    • http://files.charissaclarkhowe.com/uploads/1/3/0/7/130775795/ririvuv.pdf
    • http://samax.rallypointdefense.net/uploads/1/3/0/7/130776791/xepotibituxatipumeja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/16358824412.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4600/files/34891252835.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/rirubovugudiputofejosop.pdf
    • https://cdn.shopify.com/s/files/1/0435/5925/6225/files/3378259752.pdf
    • https://cdn.shopify.com/s/files/1/0427/9028/9574/files/98178917669.pdf
    • https://cdn.shopify.com/s/files/1/0438/0160/8353/files/convert_ppt_to_word_small.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/33849487142.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/pegebupatisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/what_is_altrow.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/fawelure.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_off0000674a.bin
63eeea792d93fad0cfad6eedc02a6807c523822a84af50cef1f490a179d6d0ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 5088 bytes
font_01_sfnt_off000078a7.bin
1c3d72cc5686d07d1e360cc3cbed9d5910ee0fff82be3eccd659cd80cd4b84d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A7 10112 bytes
font_02_sfnt_off00009b4b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4B 4324 bytes

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