Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bb3b0f4900cdd3…

MALICIOUS

PDF

54.4 KB Created: 2020-08-19 21:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc12e84cc4f13cd0e7cbe8b95a12eb2 SHA-1: 7d1c55c206de143c327d42fa623ba530a56c7a22 SHA-256: 61bb3b0f4900cdd319807d31c44c02831c0384dd7a668e890f0e010165ea2e31
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', indicating a malicious intent to direct users to potentially harmful content. The heuristic 'PDF_SEO_LINK_FARM' further suggests a large number of external PDF links were generated, likely for SEO poisoning or to obscure malicious destinations. While no scripts were extracted, the embedded URLs and the PDF structure strongly suggest a phishing or malicious redirection attack.

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/pify?keyword=branches+of+physics+pdf
    • http://files.hebshf.com/uploads/1/3/1/3/131379899/9084a554c.pdf
    • http://files.davidslandscapes.com/uploads/1/3/1/3/131380000/basinafulizepet.pdf
    • http://moweg.hardawayhighband.com/uploads/1/3/0/7/130776716/lifutimetepi.pdf
    • http://files.littlecharliesbakeshop.com/uploads/1/3/0/8/130814935/6067749.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/lawerujirisuduf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/76189806238.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/minority_report_plot_summary_spoiler.pdf
    • https://cdn.shopify.com/s/files/1/0439/1380/5992/files/99468553795.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/30272939265.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/gonisuketa.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/at_long_last_asap.pdf
    • https://cdn.shopify.com/s/files/1/0439/0735/0696/files/mirror_pressure_cooker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/kamegilaruvetexalonenewov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/76494210206.pdf
    • https://cdn.shopify.com/s/files/1/0433/9626/8193/files/saint_john_perse_anabasis.pdf
    • https://cdn.shopify.com/s/files/1/0438/4099/5490/files/gofosuromexijekemojonizo.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_off00007e5e.bin
8a84435aafc0cc3eeca68ca93dd0e4004d81f40785174126b0878fcf6b9a9ff9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 5360 bytes
font_01_sfnt_off0000908d.bin
025fe71ccc969531e0313d37b3846731d0e79e6acdaad9ec2bbbba4aa4ba9c1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908D 11348 bytes
font_02_sfnt_off0000b758.bin
647fa2c693c8ab21cc25743b8708e2ebf080f540c0660d69714ab6ec7e0111fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB758 16108 bytes

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