Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d66e201503ad3c…

MALICIOUS

PDF

44.0 KB Created: 2020-09-05 00:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb7182ebab93f67abb6820afca8fe62e SHA-1: 6bd7ada4d4a328b126fbb05aa2b4d23cdb4b861f SHA-256: a6d66e201503ad3c06ba53005976f150307cd70cc7f7909a2056063a66bede9d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text referencing an 'annual report' and includes the malicious URL. This suggests a phishing attempt to redirect users to malicious content under the guise of a legitimate document.

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=ingenta+plc+annual+report
    • https://cdn.shopify.com/s/files/1/0435/9795/5229/files/desebufegigemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/3620829980.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2154/files/lowirejezatekuwugazu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/10428864215.pdf
    • https://static.usrfiles.com/ugd/8c2e83_399e2eade18941ab8a8269f4ff0d5519.pdf
    • https://static.usrfiles.com/ugd/67e251_a24c9f1d16814e3792e0e15c7a3d6968.pdf
    • https://static.usrfiles.com/ugd/7f5dc5_fe319e781b864e5fb165a59a1f04c615.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c3186151282412994eede7da5cfc590.pdf
    • https://static.usrfiles.com/ugd/cb5dea_380c66d5081a486f9971c27cabe0f093.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_be7dd0dc563a41c382bfaeb02391cba3.pdf
    • https://static.usrfiles.com/ugd/9c43ec_3c4af0fd6d9d4e29a5ba84081884dcf7.pdf
    • https://static.usrfiles.com/ugd/94e5ef_0cb133427d7045eca9b7fb2b912bb9f7.pdf
    • https://static.usrfiles.com/ugd/112488_d3bcdee124e647178f3250c8fb5f2359.pdf
    • https://static.usrfiles.com/ugd/865d50_8e88ff936bc1461f88f0eb8459b01e40.pdf
    • https://static.usrfiles.com/ugd/4c3ae3_d7c5b33524ae49119bbea159c86e6d75.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006105.bin
9a204498f0a25a51aa10c02aed10df20134dd2d9921f323da283501a668a975c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 4696 bytes
font_01_sfnt_off00007100.bin
6d0cab8d7c20d99bafe408e902e7d4e1f0517d956b0cb728e84d723c744500b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7100 10552 bytes
font_02_sfnt_off00009503.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9503 4324 bytes