Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e2a1f3884fc212…

MALICIOUS

PDF

50.6 KB Created: 2020-08-30 20:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5310fd511edf3cd8e8ceea81de7fd15 SHA-1: 9d0d2ab146ff33792045317448bcee371f88b178 SHA-256: 68e2a1f3884fc212cfe88ab5686a9da84ee9fd21ae1ec1eb012f2a07c01120a9
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flags this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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=when+i%2527m+gone+mp3+download+musicpleer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/bowidalizukejiraxofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7871/2472/files/ajax_tutorial_w3schools.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/saleluvajefatumezemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/toliwetid.pdf
    • https://static.usrfiles.com/ugd/7f46b5_cedd5251dc30427690a88c2c5283d30a.pdf
    • https://static.usrfiles.com/ugd/2c8d66_d6fa26a2f17d41ccbc41bcbaffc7c14d.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_fb33e6e674fd4f6db3b1bc6d7db2cd5b.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_6fcc207576624e0a8dc09a2579fb9d60.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4557/files/mewuzelavatevileladujem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7601/7559/files/buenaventura_durruti.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5708/files/kofoxujikunukerag.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/magic_of_thinking_big.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e31.bin
bbbfbd3f8ee15dae605df12f2d79ccc6670a948e9367a30f162bb2f7facc0b0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 5788 bytes
font_01_sfnt_off000081d6.bin
3c5d6b38e0c76c2c5aa59da30736d0274969c6a5350d5042fe8c3e1533a27a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D6 10388 bytes
font_02_sfnt_off0000a589.bin
034e722598894f1edef9385b4a0615298460d4fe65c5d43aa9a351c7ef1f6b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA589 16888 bytes

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