Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2dcd04aad46c2d…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 20:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d31974fbcfeba84fa3f34e1a09b63c24 SHA-1: ee597f7eb15fcbd7d9fed663939fb1ea58501e90 SHA-256: 9c2dcd04aad46c2d0d7c838ee15bbdb4d426531279f5230e9e7ae17619fde224
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with multiple embedded URLs, including a redirector to 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'exchange 2010 mailbox permissions report', suggesting a social engineering lure. The ML classifier strongly flagged this PDF as malicious, and the presence of redirector links indicates an attempt to lead the user to a malicious site.

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/pify?keyword=exchange+2010+mailbox+permissions+report
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/posibubexutanokufufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/60852137256.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8083/files/mexican_rap_groups.pdf
    • https://static.usrfiles.com/ugd/f967ac_27c3244ce5fd4aab998adabcbbc38bb2.pdf
    • https://static.usrfiles.com/ugd/ba3095_0192d5e8c0694299b57f8560936f083e.pdf
    • https://static.usrfiles.com/ugd/ee4a13_b0a42b45e4174843937ccb6dcf131166.pdf
    • https://static.usrfiles.com/ugd/63022f_6c2f6303aa4549e1b5e61719b37337e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_32b88497fe0d4453ae700cd695b252f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_14cb80bdcb40485c9783e7d101722bf0.pdf
    • https://static.usrfiles.com/ugd/078c79_142145d7c14f442895b562c5d0e956b4.pdf
    • https://static.usrfiles.com/ugd/3f80ec_f10a7d533a024e7b81595b411c6c88d8.pdf
    • https://static.usrfiles.com/ugd/5a1791_87ca4e2c141b4f6ab8fc788655a770a7.pdf
    • https://static.usrfiles.com/ugd/26938b_50d8ea913c46461aa95ecf290df9b373.pdf
    • https://cdn.shopify.com/s/files/1/0431/2960/2205/files/public_finance.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/visazexax.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/love_alarm_songs.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_off0000706b.bin
a2038a3d655f73f0f9cbb203494e479e64d99455b197c142b8eb44c936dd5d8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 5840 bytes
font_01_sfnt_off00008427.bin
60925b865cedb02612b5b0bd25a87998f013327efbbb8ec88728b53305233aa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8427 14492 bytes