Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ceb21993a58980…

MALICIOUS

PDF

40.0 KB Created: 2020-08-22 20:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c1502d8537bc69fadf1c28785bd44f6 SHA-1: 18f8c65801ef088a1959e5002047cd4d1e120bb3 SHA-256: 13ceb21993a58980d8ca60d3d89192f2eda56cbd34f1fbd8a8da98e15f7297c6
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for distributing malicious content or conducting phishing campaigns. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, suggesting a potential link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL is a high-confidence indicator of malicious intent.

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.com/pify?keyword=talk+like+ted+carmine+gallo+pdf
    • http://files.hotseatcustombaits.com/uploads/1/3/0/7/130739986/nilukotojujuvug.pdf
    • http://duxux.daisymaemoore.com/uploads/1/3/1/4/131412032/ramojesinil.pdf
    • http://files.royalrampsandrails.com/uploads/1/3/0/7/130776142/tijexelunusulu_gonibubeguwot_gofivaneluta_vidazeg.pdf
    • http://banetimiv.livingwellwholefoods.ca/uploads/1/3/2/8/132816066/fekawirenili.pdf
    • http://files.johnnocasson.co.uk/uploads/1/3/0/7/130739232/8130922.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8089/9989/files/xajobaferegizasoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/effective_interpersonal_and_team_communication_skills_for_engineers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7677/0205/files/jaseginatizobaxip.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/36378814354.pdf
    • https://cdn.shopify.com/s/files/1/0438/1802/5122/files/activator_microsoft_office_2013_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/zusabolomore.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/factors_contributing_to_effective_communication.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/49699453166.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/samarukavubosajijoxudalip.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/14959247918.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d89.bin
e6d578641607c6656bd24083e77daf21d746d9c4abc05adbfe4c53f7d6068595		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5312 bytes
font_01_sfnt_off00006f80.bin
ace747f84655db6693f1a260e5384863648d2b73636550da37abcd4fef2d682e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F80 10412 bytes

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