Malicious PDF — malware analysis report

Static analysis result for SHA-256 252b0fcee69cd16d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-31 10:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f86daa896967b9380de7cc078e1b8c69 SHA-1: 8aa42bf23f9718e61b939852b405308541587b83 SHA-256: 252b0fcee69cd16d67e97967f329752d4fcaa4e4132bbc0d716eb7123ed01936
152 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, pointing to 'https://ttraff.ru/wix?keyword=dark+knight+rises+game+free+download'. This URL is presented within the document body, suggesting a social engineering attempt to trick the user into downloading a file. The presence of numerous other PDF links, many hosted on cdn.shopify.com, indicates a link farm, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=dark+knight+rises+game+free+download
    • https://static.usrfiles.com/ugd/6924eb_c577260d29c44f5fa89f2bf3eb550520.pdf
    • https://static.usrfiles.com/ugd/b8c837_119944b4b5ee4258828b5250fe89c084.pdf
    • https://static.usrfiles.com/ugd/2813e2_0e3cc179babb4e238a8bec110daee50f.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8274/files/makanuvedubade.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/27_rules_of_subject_verb_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/nifolelasasenivuro.pdf
    • https://cdn.shopify.com/s/files/1/0446/9473/2953/files/39325519272.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/69951274837.pdf
    • https://cdn.shopify.com/s/files/1/0461/9275/4841/files/49959632759.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4630/files/13095926590.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4132/files/bodomap.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_a931d39c21314b569e8829c7c964ad5d.pdf
    • https://static.usrfiles.com/ugd/a01749_218e11ecfaac4cb3ba4baee1dd7fa655.pdf
    • https://static.usrfiles.com/ugd/d775a9_0c61ff7f100549b9a17ee7324a53f7a9.pdf
    • https://static.usrfiles.com/ugd/9e14ca_478701d94d0c49bfb6ca7a0b5bb1c3d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2a1da7199a44c059a1aa85f7bc1cda8.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_off000069d5.bin
1cf586e859d3c97f1f95f447410cbe86f8120371c695bdbb7f3231c1cfb84489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D5 5476 bytes
font_01_sfnt_off00007c5c.bin
8de4c9f6c65cd9b130f23933e461a04b789f07073466fba151d064c8b520352b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 10296 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.