Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dbc14a80add915…

MALICIOUS

PDF

66.8 KB Created: 2020-09-01 01:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9db3c34fbca3c68072d351b8184dc1ff SHA-1: 31fb6fced08826ebab45584f8d62952baf8fb3f3 SHA-256: 63dbc14a80add915dd573d99defa22c27b7690252250fcd58bcc6c4d6a706a82
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes text suggesting a puzzle or logic game, likely a lure to disguise the malicious intent. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic to distribute the malicious PDF. No scripts were extracted, but the primary malicious behavior observed is the redirection to a known malicious URL.

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.com/wix?keyword=logic+pic+picture+puzzle+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/585b1d_7053e165b91f49328da95a17fb0f4496.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_a55c5b53ea8242a4b44f8364575d100f.pdf
    • https://static.usrfiles.com/ugd/87a178_a0e6e11852ed4a03bfcb7c84f553591c.pdf
    • https://static.usrfiles.com/ugd/078c79_63ebb31ca8424cb994f0c93baaef0951.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/pastor_appreciation_speech.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/15202420918.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/94879802366.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/alias_grace_full.pdf
    • https://static.usrfiles.com/ugd/b8c837_94d27aa776bf44f5a4c7e6f533809d00.pdf
    • https://static.usrfiles.com/ugd/3cb679_0d5d6ae43a09463e841dd7404bce5508.pdf
    • https://static.usrfiles.com/ugd/0049ca_0cc445d69c9c4889afe01734fff4d379.pdf
    • https://static.usrfiles.com/ugd/3aee12_f358e90a0eea44ad92305bf797fe6776.pdf
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/dakusorivilu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/3627210069.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/pifeluw.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_off00009553.bin
7c589101d41a5aa71b61f89d78cde62f46af5a7b23dfdb1eabcce964bc59e496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9553 5068 bytes
font_01_sfnt_off0000a6bf.bin
e6ee1622a847608169995286de71a3d087af74373ead7303cbde467085ae19f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6BF 16200 bytes
font_02_sfnt_off0000d965.bin
313c3940a6f4aae92ceaa1b1a843de6e6f13411355a457aba6e018c383fce54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 16060 bytes
font_03_sfnt_off0000edfa.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 4324 bytes

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