Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9f463694bca05f…

MALICIOUS

PDF

60.6 KB Created: 2020-08-29 08:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce223a3d5de4a4409fd7c61f3a9011b9 SHA-1: 94683b3116c1a251d3ae040cd55db2ee8d3cf481 SHA-256: 3e9f463694bca05f70f948b0b0ba8e19c348ff29af33232ea7409685262afa4a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link disguised as a search result for 'bell hooks madonna', which redirects to a malicious URL. The document also functions as a link farm, hosting numerous external PDF links, many of which point to static.usrfiles.com. This indicates a likely attempt to drive traffic to malicious infrastructure or engage in SEO manipulation for malicious purposes.

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=bell+hooks+madonna
    • https://static.usrfiles.com/ugd/b8c837_25f4a55853374376ac28586243a8f969.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5432a837e1640449b5d90d6a5e1ebe3.pdf
    • https://static.usrfiles.com/ugd/b8c837_157440d2edae43d6b7bdffdd7c5d561d.pdf
    • https://static.usrfiles.com/ugd/b8c837_25e9d52f3c044af6b83da60a9ad79076.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5d902eee5824e589dc911f1ba38adaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/biodata_form_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/48763872188.pdf
    • https://cdn.shopify.com/s/files/1/0440/1309/3029/files/rxprep_course_book_2017.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9767/files/toxazu.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e56ba57024c4abaab5d3aeeff22a8d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_146b08c34cde469494a55c87ba4bcac1.pdf
    • https://static.usrfiles.com/ugd/b8c837_40a3304c0d1e49b8b5dd1affce370d43.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/29583094381.pdf
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/fallout_new_vegas_patch.pdf
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/10274114376.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a358.bin
b23205bf8e3231cfbf8505f0398009b160758c74616c6bd869d9ac9010ce0147
pdf-font-stream PDF embedded font (sfnt) at offset 0xA358 4740 bytes
font_01_sfnt_off0000b33c.bin
d262f331f557b4a7814608dd7d2fe84189f02ae0a03ea9bb645a570f4bc2735c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB33C 10460 bytes
font_02_sfnt_off0000d713.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xD713 4324 bytes