Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7c757c4336060…

MALICIOUS

PDF

62.9 KB Created: 2020-08-03 18:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01a62485c1beae4ef93c930ebb754547 SHA-1: 4de1bdd3d7022c10ab07c87da67cf56e8ee16a22 SHA-256: 02a7c757c433606044a47707cf45931cc4f676e39eff592dd20f34907a006c6d
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL which is likely intended to trick the user into clicking it. The PDF_SEO_LINK_FARM heuristic suggests a large number of similar links are generated, pointing to a campaign distributing malicious PDFs.

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/pify?keyword=astral+body+projection+pdf
    • http://files.lagabriellacoffeeshop.com/uploads/1/3/1/0/131069890/fefuzozixur.pdf
    • http://files.tracymajka.com/uploads/1/3/0/7/130775393/pewegona_dunujoz.pdf
    • http://files.jozibestwomensclinic.com/uploads/1/3/1/1/131164063/vewabozizazu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/23678231360.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/78448545374.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5978/files/download_soal_aritmatika_sosial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0436/9580/0475/files/ganewobevuti.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/88890662392.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/wunoxorej.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/gefasuzoligepumow.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_off0000ac84.bin
96a8ae036b121cafa7822e353cd800a427a54195f95aa6c94ac2e6e3a2c2f8c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC84 3232 bytes
font_01_sfnt_off0000b7ff.bin
e1fc080a92d7809ef01aa4630baac38a07e54c56fcffaeb00bb5e91203b5bbbf
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FF 5456 bytes
font_02_sfnt_off0000caa7.bin
af8022537d0d44f9146ea7203e379a4d70cf930b0c3234a25ad4d32d3009c434
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA7 10504 bytes