Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c291dc2d16324df…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 23:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 976517b6fc46e350d9dfba75cb0f4f7d SHA-1: 01f71c9ea343f0c761bb8c6a6972c09fa23207cf SHA-256: 6c291dc2d16324dfe8dcac20ab02d39817aafcfa1ee4f2cdbd3f1efbd2e41f2e
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to trick users into visiting a malicious URL, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=mr+robot+season+2+online
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/xamogimogakegonopijixemox.pdf
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/86082191852.pdf
    • https://cdn.shopify.com/s/files/1/0428/5100/8671/files/chinese_visa_application_form_for_uk_citizens.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/manimakafevinefajolexesav.pdf
    • https://static.usrfiles.com/ugd/b8c837_235f4b208c544ea4a61d2f19902fb17e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_623b77815142466584cc69fe5b4dead3.pdf
    • https://static.usrfiles.com/ugd/b8c837_94f15a7589ab442185a06ff5ac978955.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5334062b76041b4906fa610bd60d58a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9abba6067f14abaa91de48c8a82056d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63a33f508754923bdda1c87aa9d44a9.pdf
    • https://static.usrfiles.com/ugd/f4de5e_700bb701d5ab4a87b0c35be51055ef5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e981f0564dc942ea90d5373a1c1608a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_02b0a379d22746769e7362df630e0d60.pdf
    • https://static.usrfiles.com/ugd/b8c837_a538c46f3e7540e2b482ad1377d0217a.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_off000066a0.bin
4843a888beb146b4f0c11b6a0be3d70ce76fa86e5231fdbf9f50956eb497ca4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 4956 bytes
font_01_sfnt_off0000778e.bin
7e17458a5308ecf05ceba550ddaf322fced09abbdcccae0731f052aea20f291a
pdf-font-stream PDF embedded font (sfnt) at offset 0x778E 9924 bytes