Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6f0a9d7e340eb9…

MALICIOUS

PDF

85.1 KB Created: 2020-09-06 05:32:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfd40c44894f2816384e705f27e18de2 SHA-1: 434bd58ee454f6672c2f8af107204582eaeba4f0 SHA-256: cf6f0a9d7e340eb975522775782449fae70c079e55a7a9af25f3192b177d0de3
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a URL associated with malicious redirector infrastructure, disguised as information about Canadian citizenship. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains the same suspicious URL, reinforcing the phishing or scam lure.

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.club/wix?keyword=guide+demande+de+citoyennet%25C3%25A9+canadienne+mineur
    • https://static.usrfiles.com/ugd/3794ad_77d42b51510a4fe98055fe866929b561.pdf
    • https://static.usrfiles.com/ugd/f59309_2ac05d9852d74f098fa6b284482a5a6e.pdf
    • https://static.usrfiles.com/ugd/2ac701_c56bc6131de3418a8c1ee13742a116d1.pdf
    • https://static.usrfiles.com/ugd/eddc50_7a0984c0acb244048273eea184136aff.pdf
    • https://static.usrfiles.com/ugd/739437_0b1371231cee462c9ab43f819f1cf8bd.pdf
    • https://static.usrfiles.com/ugd/d017d5_ac73cd54ddb945b9a3e2629a48f0a3bb.pdf
    • https://static.usrfiles.com/ugd/c5d40f_0958a648dc504ab28c7bfce90e4a0bf4.pdf
    • https://static.usrfiles.com/ugd/dad7b5_a5f9adde7d684933bf6b1e2ddd9bae61.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_65a69e6b09c14dc1aea24f94d1434e56.pdf
    • https://static.usrfiles.com/ugd/96564c_5e196f54ca2a4d4cb2b54926490a71c5.pdf
    • https://static.usrfiles.com/ugd/0779a3_9d8696e151454bfeb110cd0eaf28a652.pdf
    • https://cdn.shopify.com/s/files/1/0434/1855/0430/files/estructura_de_un_analisis_descriptiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/cancer_immunology_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/9055/6568/files/figalaxuxukowafibakija.pdf
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/wopokativadivesobuzenep.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/27558653510.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_off00010ba8.bin
80f8be437e44a28c70ba90fbdeaf25abba65cfb68ac52d6814a6c4f97692df8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA8 5148 bytes
font_01_sfnt_off00011cd7.bin
eecbae5690e3fe03790fe9eb08f2d662790ddf3809590d3e258c92c1625b95f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD7 12508 bytes