Malicious PDF — malware analysis report

Static analysis result for SHA-256 19bcfa61b4293162…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 19:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ad9050bcd00dc69ec69d9778141e5ab SHA-1: 7486915d444ddb5f2007b026790db4df845c7b18 SHA-256: 19bcfa61b4293162dd3b501c142543f1245a90df7861cd18ce7bce955e695a39
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised with a keyword related to 'The Incredibles'. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files hosted on various domains. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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=download+the+incredibles
    • https://static.usrfiles.com/ugd/b8c837_1704dd35a41148099ccebb10aa52a13f.pdf
    • https://static.usrfiles.com/ugd/b8c837_de221f358af14cefb7bdd19a92485e94.pdf
    • https://static.usrfiles.com/ugd/5be868_de92732d3e96492985571689d2ebcd38.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c37149fb4284a5ab6f438377b4050a9.pdf
    • https://static.usrfiles.com/ugd/23e9be_027a813f7a034b9eaa16353e9e27300a.pdf
    • https://cdn.shopify.com/s/files/1/0438/9548/8680/files/fuxisubasovijiti.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1522/files/79525766416.pdf
    • https://cdn.shopify.com/s/files/1/0435/4100/4439/files/domeligumukutejo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/list_of_justice_league_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/pelalisuxigevemafizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/weed_eater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/44769699372.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ab.bin
803574b5d1a92b2ca152454059e9145c37664fe0ec5499b5faff9d82c5241604
pdf-font-stream PDF embedded font (sfnt) at offset 0x66AB 5256 bytes
font_01_sfnt_off00007891.bin
980654cdf8d230c6b0b44dfb45f240411b24ca1b618d1376cfad829220e8bdfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 10060 bytes