Malicious PDF — malware analysis report

Static analysis result for SHA-256 940603adf811996a…

MALICIOUS

PDF

47.4 KB Created: 2020-08-08 01:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b2b3907852229694c404377e11b7e42 SHA-1: a11e828de31a2babbe28483a3af7a1401aaf3316 SHA-256: 940603adf811996a134169aaaff1e856067fc032b968bf055fcde9f755a8f3f0
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to 'reasons for absenteeism in the workplace pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other links to Shopify PDFs suggests a link farm technique to potentially improve search engine ranking or distribute malicious links.

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=reasons+for+absenteeism+in+the+workplace+pdf
    • http://files.gelaboutique.com/uploads/1/3/1/6/131636972/19e76cef0848f.pdf
    • http://weradilad.drlremovals.co.uk/uploads/1/3/1/4/131407227/logol_walujig_notif_tigaxa.pdf
    • http://files.mtgprocesssystems.com/uploads/1/3/1/0/131070452/1161923.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/engineering_with_excel_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/17360044683.pdf
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/sodijirakugaturunomosoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/54368848510.pdf
    • https://cdn.shopify.com/s/files/1/0435/0741/7253/files/46638712602.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/90647915151.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/cancerous_cells.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/37766949688.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/jexoliwumutoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/46822324352.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_off00007a50.bin
c16dbc361cd7709e69c9747a701c1861f5949312418a24240ddb663532bdc91c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A50 5696 bytes
font_01_sfnt_off00008d9a.bin
c1f6b4ab33e772a76b91c7cb039de490e08193c501ee064a32ea4770931d2590
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9A 10392 bytes