Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1e4c055a90dd40…

MALICIOUS

PDF

52.4 KB Created: 2020-08-30 03:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd69a8b8ad52e2ee119447a2777c36c5 SHA-1: 5924d6138bd6314e84eb48ea068af18a87f58d25 SHA-256: 0d1e4c055a90dd4078b73f9c2a17ae95e97ca7ee4141929f34375f9d895d5d59
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain references to game downloads and the malicious URL. The presence of a 'Password-protected archive handoff' heuristic suggests the document is intended to trick the user into downloading a password-protected file, likely containing a malicious payload. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=gta+vice+city+indir+saglamindir.net
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/nezajarutejujagajiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/the_adventures_of_tom_sawyer_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/army_retention_bonus.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_60e10c92578c48c18d307f4682a31f50.pdf
    • https://static.usrfiles.com/ugd/e3c460_74020bb817794ca097e92fcca1b19313.pdf
    • https://static.usrfiles.com/ugd/b8c837_5be36ac1631b4b15bfdcc26c2d20537c.pdf
    • https://static.usrfiles.com/ugd/585b1d_99421795c5b545878b62b60a128ee854.pdf
    • https://static.usrfiles.com/ugd/cf79db_a27a0a7a47db4500a4efe95d73638978.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_6745eddbc17349108bbbed31c952d512.pdf
    • https://static.usrfiles.com/ugd/73cb9e_311f499e54804819afb55916ea39d9b7.pdf
    • https://static.usrfiles.com/ugd/a298ce_40775cc03cb94ed6837e0cc99f7243aa.pdf
    • https://static.usrfiles.com/ugd/a18aa6_36f9d6bf11fd42a98222900554b1012f.pdf
    • https://static.usrfiles.com/ugd/b7ed05_9af12544d941411ab19a809773021dec.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2e5d2036c146418585a26300aef531.pdf
    • https://static.usrfiles.com/ugd/b8c837_01d9be52db3f48eb85dce203f68a2ad5.pdf
    • https://static.usrfiles.com/ugd/565485_687e8c5ee1064fe582acd3f127c9e74e.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006195.bin
d5ea0b0295b10a98ca693f7f06ef4ec6d267bad6bbcf8a4f8ffb7522971bd55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 5164 bytes
font_01_sfnt_off00007318.bin
d0203eecc218c8beb8e6dc86aca0ea86f694d6f458e3d7812154c1885dce39c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7318 14832 bytes
font_02_sfnt_off0000a125.bin
0dd0f70575564cfea764bcc00266283b8a18401ff3d5346bafa654237f32d589		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA125 16140 bytes
font_03_sfnt_off0000b624.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB624 4324 bytes

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