Malicious PDF — malware analysis report

Static analysis result for SHA-256 39eacddd7fc3602a…

MALICIOUS

PDF

33.6 KB Created: 2020-09-18 02:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d753695cf871b2effbce907ab6cde7cb SHA-1: 6e56490af2999b577fbe4fd86be051fe1ba4bbde SHA-256: 39eacddd7fc3602a5fa95be3e78dbae107c33dde2761e466b07a56663fb851ce
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=panasonic+ag-1960+manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a manual for a 'Panasonic ag-1960'. The presence of numerous other PDF links, many pointing to file hosting services, indicates a link farm strategy, likely to obscure the malicious redirector or to appear as a legitimate document repository. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=panasonic+ag-1960+manual
    • http://files.whatsyourscience.com/uploads/1/3/1/4/131453536/radewogisof.pdf
    • http://bunut.soultouchtherapies.com/uploads/1/3/0/7/130775411/negefujapajajabap.pdf
    • https://41ab8eda-d43e-49c9-b489-63b7e6414283.filesusr.com/ugd/49f5ef_b3fdef0b95a94a51b58b7db7053c136c.pdf?index=true
    • https://77803d78-eedc-4843-be1a-6d0a37f78f98.filesusr.com/ugd/23a6c3_6c84b46d42a6440a8c87adcefd1bd63e.pdf?index=true
    • https://d80c5838-c6d4-4aa5-96a7-8018d17bd63e.filesusr.com/ugd/95b9ea_6fe84d32f4a7417b8c8b9ade633bad02.pdf?index=true
    • https://c4c28dc3-1714-4d56-9bed-003957c6a136.filesusr.com/ugd/9ef0c3_78ba12303ba14663827f4a3e96d3f0ae.pdf?index=true
    • https://98b7a41f-15a3-48a5-a917-afcd8711997e.filesusr.com/ugd/daca0d_fb490411f21f48868a38e196b51d89c7.pdf?index=true
    • https://7f878f9a-edd8-4f74-a9f2-24ccf9378864.filesusr.com/ugd/1cc7e8_1c6fc11105a74d7eaf144ef239ef2a9b.pdf?index=true
    • https://3ae48336-8427-4e34-9433-7bf38452c323.filesusr.com/ugd/685707_9a12b311ed1e4f8a97a31b0b5539de51.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/vamalifuzuzaxurewen.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/depazamunir.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8318/files/delete_branch_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/varujakejere.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_off000045e5.bin
e109d5c06cfecb93650e4a95658f2beaa2d5ab0aadc0ca10f3c77cc4074387ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E5 5560 bytes
font_01_sfnt_off000058c5.bin
d59b6758e4bd6f09b67d9842905dba851a8dfcac27c24e037af23a69674adefb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C5 9744 bytes

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