Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4f2056f949ebcc…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 17:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0458e9ec24151624a65f309be48270d5 SHA-1: d3ebb3f171bff311fdf691dc64dd60b37d9350a4 SHA-256: 0b4f2056f949ebcc83e6dfb3835c8da1ff4941ef23361a318d49581c7be19d50
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, characteristic of a link farm, with 28 external PDF links identified. One of these links, 'https://ttraff.me/wix?keyword=renkli+tecvidli+kuran%25C4%25B1+kerim', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, suggesting an attempt to disguise malicious 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.me/wix?keyword=renkli+tecvidli+kuran%25C4%25B1+kerim
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d5708ec81aa04e80abf8143ce2ac87a4.pdf
    • https://static.usrfiles.com/ugd/de60da_95f3334b8f974ffebd23523a61f764d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_58a4473bb4ab46d0961476458d3b1b43.pdf
    • https://static.usrfiles.com/ugd/b8c837_6269df8c38474704b9020af4bb0b4d61.pdf
    • https://static.usrfiles.com/ugd/91e123_98214433d6b2491caa2c91ef16c16aa4.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/mobogenie_android_8._0.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/45981357310.pdf
    • https://cdn.shopify.com/s/files/1/0431/5473/5264/files/81726699374.pdf
    • https://static.usrfiles.com/ugd/b8c837_7339051676e34dbe9b5a7647ef9d821e.pdf
    • https://static.usrfiles.com/ugd/067ecb_0d5f2579bec64ec39595378bc213e422.pdf
    • https://cdn.shopify.com/s/files/1/0437/4645/9809/files/escalation_matrix_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/12239527261.pdf
    • https://cdn.shopify.com/s/files/1/0455/6773/8021/files/pdf_caballo_de_troya_3.pdf
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/python_copy_to_clipboard.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_off0000609d.bin
085a9b6ed36cbfd2d43bce32142de2a35f808ebb1d2a1e1dbc01db5b02c7c220
pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 5068 bytes
font_01_sfnt_off000071c4.bin
aa75f8a765eabc66c1d5c7e835b56cf349cd82d740fca19af68edafe817357ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C4 12004 bytes