Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6d7aeda4980c4d…

MALICIOUS

PDF

45.3 KB Created: 2020-09-09 05:38:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01cf8bb599d8878bcf9fb55972aa9d0f SHA-1: e4516ae16df78190a00013e367583460b926cc33 SHA-256: 6f6d7aeda4980c4d83bcc5b56584b0678e324843c59e163b4f482e10dfe4666a
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a dress catalog, which redirects to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, suggesting SEO manipulation for traffic redirection. No scripts were extracted, but the presence of embedded URLs and the redirector link are primary indicators 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/wix?keyword=beautiful+formal+dresses+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_251f33ad693c44a0a4e98a54d6973966.pdf
    • https://static.usrfiles.com/ugd/696b8a_69a9a9ebd17649a09e9765a80eb66b92.pdf
    • https://static.usrfiles.com/ugd/fdee49_0957df09338640569503b2b11609c6df.pdf
    • https://static.usrfiles.com/ugd/b2ba6b_a7f8146c8f6d489a9be0bb033dbd5027.pdf
    • https://static.usrfiles.com/ugd/e02969_24ef26b148304e3980de949ad1599539.pdf
    • https://static.usrfiles.com/ugd/2b25b5_7e4b272d695647d7885361fbaaba14f3.pdf
    • https://static.usrfiles.com/ugd/6f9b04_e643692e8b5c45519d475f6365c4947a.pdf
    • https://static.usrfiles.com/ugd/b8c837_57ede5627bd64971b4976289694babe6.pdf
    • https://static.usrfiles.com/ugd/253000_ea33843b1911409882818c6a0ab340c0.pdf
    • https://static.usrfiles.com/ugd/97368a_8280454ecdb24754810d7062d5709f9c.pdf
    • https://static.usrfiles.com/ugd/b65acf_e9c107a8d9f54e8ba125e81e13f39bf6.pdf
    • https://static.usrfiles.com/ugd/18f527_e250a18438f943518b747836f3a758d0.pdf
    • https://static.usrfiles.com/ugd/bae363_51c4e9450e734ce3ac7a0d77a9f3863c.pdf
    • https://static.usrfiles.com/ugd/0bcf16_2050e1a49cbb41b8893f1febb612fc4f.pdf
    • https://static.usrfiles.com/ugd/01bc73_9e4b83a4c37f4b9a8d4944138bd67466.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3137/files/adobe_scan_digitalizador_de_ocr_apk.pdf
    • https://cdn.shopify.com/s/files/1/0470/6828/3048/files/bisigubipewuwupaxuronixib.pdf
    • https://cdn.shopify.com/s/files/1/0457/6749/1750/files/59009500632.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_off0000717c.bin
20d78cb6906879b0f44d1c0740c8be568af4f7dec45790911ac3ea8d91c47612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717C 5584 bytes
font_01_sfnt_off00008462.bin
0f8e36fc24ced81742527032178cdca10c7f4fbc25ed0050571607346431cb51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8462 10708 bytes

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