Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadf06748ce3f2ae…

MALICIOUS

PDF

42.3 KB Created: 2020-09-08 18:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9d22716ffdfd389a6a5dbef3640d645 SHA-1: d7e50c41b0841bb5a6ce328c6ccc5f1146701060 SHA-256: eadf06748ce3f2aefcac4073773dd9b228ac8019936b41744fadea02139e406f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.me/wix?keyword=sleeping+with+the+enemy+imdb+parents+guide', is designed to lure users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.me/wix?keyword=sleeping+with+the+enemy+imdb+parents+guide
    • https://static.usrfiles.com/ugd/bb10c5_3add5d2a9ba743fd994fce8f41a69a7e.pdf
    • https://static.usrfiles.com/ugd/f17c08_7d9304f9f380471fa77a01410a6c8589.pdf
    • https://static.usrfiles.com/ugd/b50c55_05e7f792f15742618cbe8625af65cd8c.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_ff026c621e2148e5802da1773d3606c0.pdf
    • https://static.usrfiles.com/ugd/cd1d52_5d4ace91a7534986a2eef34c3dde5624.pdf
    • https://static.usrfiles.com/ugd/353d00_ea2a2575292f4cb2a247edc2e6773063.pdf
    • https://static.usrfiles.com/ugd/041b56_d27cfc8505ab45c595db773f05869264.pdf
    • https://static.usrfiles.com/ugd/d3758e_50cb796d5494443fa68e2617edce6039.pdf
    • https://static.usrfiles.com/ugd/787b0a_def7f05f7e9d403b938f97f57ada2c08.pdf
    • https://static.usrfiles.com/ugd/735189_bc54ec2223a74e41a593157c356a1346.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_off0000579a.bin
f35372d2d2a5eafd758aafbcd426ab1fbf046ca8b7575af19c49d4ff318584ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x579A 5584 bytes
font_01_sfnt_off00006a6d.bin
4a61601e3ad6681e079ed4b54037e2170640f8ab1b91250678adedca4b24087f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 10536 bytes
font_02_sfnt_off00008e63.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E63 4324 bytes