Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01e1b2456330935…

MALICIOUS

PDF

36.9 KB Created: 2020-08-05 22:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9cf911bf4fd4f2381932accc54b0eda SHA-1: 189b47ea92919411e7d76703b3a87f1284324188 SHA-256: d01e1b24563309356759d56b7ae2a70739ba70e087b9d5e79b245562db9c8463
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'States of matter worksheet grade 2 pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicated maliciousness.

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=states+of+matter+worksheet+grade+2+pdf
    • http://files.downersgrovecpr.com/uploads/1/3/1/4/131410479/sajilusorisofixus.pdf
    • http://files.campfireadventurecoffee.com/uploads/1/3/0/8/130874332/jopifajakug-ludad-fetuxonidofufuv-gelogej.pdf
    • http://sekaf.k9perfectiontraining.com/uploads/1/3/1/3/131383791/8388681.pdf
    • http://files.21cclcdm.com/uploads/1/3/0/8/130874361/a66e0ef8772c4.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/rixepurobo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/ashok_leyland_electric_bus_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/34847553587.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/raxutizinavudewipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2128194791.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/5987739.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/28536856137.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/tojolobusapokutawux.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/proceso_de_enseanza_aprendizaje_del_idioma_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/42325888314.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/easy_beginner_ukulele_songs.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/velekamokesevob.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/75236357129.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/bekipare.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_off000050b6.bin
93bc4bd99d373f2d5ca7c16b2fa4fb025d5e355b4b5dc658f6bb19812a33c649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B6 5816 bytes
font_01_sfnt_off0000646b.bin
193160ea1e4e4ec18babe1f128af6f1d67d90c7cf08f3a6ec47d2304192ac7c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646B 9996 bytes

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