Malicious PDF — malware analysis report

Static analysis result for SHA-256 0622fa0add408b31…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 00:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7f853bfb7f2a3c9e89882fec6f5999c SHA-1: 3fb7217a6e8c0d8a7982783eee207d2d123e0062 SHA-256: 0622fa0add408b316ff9b032da83fe30c0b7a5f51311ea83c34e080c5043d190
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, though heavily obfuscated, contains text suggesting a lure for movie downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links points to a link farm strategy.

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=frozen+720p+movie+download%253D
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0460/6820/3675/files/xolijad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/jeboziletomomoponazo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/javascript_group_by_two_properties.pdf
    • https://static.usrfiles.com/ugd/0bcf16_d2004e105b46414aa46b65a564b6ca39.pdf
    • https://static.usrfiles.com/ugd/628a76_e7985dc606294b5ebb145d2f81ff759a.pdf
    • https://static.usrfiles.com/ugd/4d935e_0fa1559f17004c9d8c0a46acca8b916f.pdf
    • https://static.usrfiles.com/ugd/225520_195542f8d2d644f298b500dbf75300f9.pdf
    • https://cdn.shopify.com/s/files/1/0460/3435/4340/files/iso_iec_27005_information_security_r.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/timorotagezelas.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/xudapel.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/16620077739.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/juworidejatev.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/pijoj.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005885.bin
a6ba85a8015556d8d4269bbc3d454f83a2c56b702549f0208c29579983aa7994
pdf-font-stream PDF embedded font (sfnt) at offset 0x5885 5484 bytes
font_01_sfnt_off00006b38.bin
8cb1d5d1e87ecd6e8e05663a201c8ec777d2ccf0dee34c9204ddcebcd5418e14
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B38 10200 bytes
font_02_sfnt_off00008e89.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E89 16164 bytes