Malicious PDF — malware analysis report

Static analysis result for SHA-256 774ef567be53cc64…

MALICIOUS

PDF

47.7 KB Created: 2020-09-01 12:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1656e4f2ae5f251cf39613a7aaa24fa8 SHA-1: 695d087db445427a546e249a4500c1dcf408e3c2 SHA-256: 774ef567be53cc6498f91a0bc6c8404bb4ffe3c9c083bb1821c25d56b518cd70
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to SEO-optimized PDF files, a common tactic for link farms. One of the primary links directs to a known malicious redirector. This suggests an attempt to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=lake+ontario+salmon+fishing+guides
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/fb83f1_dc104b02b7754b44a6bbaa1a30636791.pdf
    • https://static.usrfiles.com/ugd/bb13a2_932e52fe01474b22a04b3f441867ddfb.pdf
    • https://static.usrfiles.com/ugd/33ab24_889ead4c5cc84fc496621f94023d78a1.pdf
    • https://static.usrfiles.com/ugd/804ff6_6c8f4db2eca642de9e2643ab41eb73d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_862c71b3958a469c994edf2a120ba8c9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/mavunireju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/logadijojonexazoripan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdf
    • https://static.usrfiles.com/ugd/b8c837_cb50bacf17c14657b6e81bba35c5b07a.pdf
    • https://static.usrfiles.com/ugd/2074c9_3871859864c84b318064887ad9e1b521.pdf
    • https://static.usrfiles.com/ugd/73cb9e_73e17bd58e7a4ff7a297e295c1bfe665.pdf
    • https://static.usrfiles.com/ugd/221f3a_2edb9252f93e43d68791eb145f5b2202.pdf
    • https://static.usrfiles.com/ugd/f1780b_1189c49979e04b90aad0f2787d84b1ec.pdf
    • https://static.usrfiles.com/ugd/0dd040_5a00734cb3cc4aadab0f776481fd83c3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f28.bin
af9818167585d06ca39a7d2564d01d014a979c3e8d3112b4ff5cfe4ce181a054
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F28 5208 bytes
font_01_sfnt_off000080b5.bin
1d7931cd520966ec087b1c202817697a709a907a028a91e1aeb46ef5de164652
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B5 10288 bytes
font_02_sfnt_off0000a3e4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E4 4324 bytes