Malicious PDF — malware analysis report

Static analysis result for SHA-256 6368367742535a3d…

MALICIOUS

PDF

88.7 KB Created: 2020-08-07 06:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad6ebedc9b63952017210c6e78392cc SHA-1: 7995e5f8ace6a0744342cac3b54a873670261410 SHA-256: 6368367742535a3d4e9ca3decdda8df50b17707a77e1f175642862ca6ab4dba1
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a primary link to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malicious content. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=introduction+to+genetics+and+evolution+pdf', is a key indicator of this malicious redirection attempt.

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=introduction+to+genetics+and+evolution+pdf
    • http://gubid.buckeyehomeinspect.com/uploads/1/3/2/6/132683014/6196280.pdf
    • http://kagoxe.galsforcal.com/uploads/1/3/0/8/130814328/6f11bd.pdf
    • http://files.deborapsychicmedium.com/uploads/1/3/0/7/130739836/d5be013bc1699.pdf
    • http://potoxim.1320am.com/uploads/1/3/1/4/131437363/981777.pdf
    • http://files.woldstrawberries.com/uploads/1/3/0/7/130776063/rofupasopu-kukemuxa-bumalunip-jetaxafam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/30459025870.pdf
    • https://cdn.shopify.com/s/files/1/0448/4556/4065/files/english_to_marathi_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/pain_apperception_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/practica_de_enlaces_quimicos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/sakal_news_paper_aurangabad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/44751357391.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/duzeridakilosevewero.pdf
    • https://cdn.shopify.com/s/files/1/0435/6918/4931/files/80766151965.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/87167826807.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/hey_pachuco_lyrics.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011116.bin
65a8e2bf196820671b0148dc817b6ccd8e9d7e8cd247b5385b497a8131fb30b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 5200 bytes
font_01_sfnt_off000122d8.bin
e73a209ab9803e464b6b21fb87a731046b958f912866d13bc6675e8c7a4b360e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D8 10700 bytes
font_02_sfnt_off0001474b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1474B 4324 bytes

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