Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e89ea816a587ce0…

MALICIOUS

PDF

36.4 KB Created: 2020-08-27 15:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d72b04cab02cf1f52fe1d2ff5937d0a SHA-1: e1b81db90131271aa17b37053cafd638cd74db31 SHA-256: 0e89ea816a587ce05741fd37c81353772175ddc8d5c418baaa2dfe990ffe85a0
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a song and a PDF creation tool, suggesting a lure to download malicious content. The presence of a link farm and a malicious redirector indicates an attempt to distribute malware or phish for information.

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=jarrod+radnich+bohemian+rhapsody
    • http://tabab.jessereyesdesign.com/uploads/1/3/0/7/130740465/dadevilirulixok.pdf
    • http://files.davidschagun.com/uploads/1/3/1/4/131408970/sedos_xobovajito_lagadaw.pdf
    • http://fupiwiga.ggrubberstamps.com/uploads/1/3/1/4/131409090/5a907f04b47.pdf
    • http://files.leaalquiroz.com/uploads/1/3/1/4/131453022/vesikofafajabatox.pdf
    • http://files.robbiehamblin.com/uploads/1/3/0/7/130739789/1156947.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/aadat_song_ringtone_ninja.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/99292109380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2096/8351/files/forticlient_6._0_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/48411044690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9321/3852/files/xamudipor.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/canarios_gaspar_sanz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8149/0847/files/email_cheat_sheet_apple.pdf
    • https://cdn.shopify.com/s/files/1/0459/6164/2144/files/windows_10_video_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/pod_temp_tags.pdf
    • https://cdn.shopify.com/s/files/1/0438/9273/6155/files/meters_to_feet_conversion_chart.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/kogolakakapo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004df3.bin
4269c61fcd9516294c10bc80ae734b81d82480a7c106f913c041ce04ecd17eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF3 5512 bytes
font_01_sfnt_off0000607c.bin
f49ec470554b5738c94b28c648374f5275bc1c3d130d561cb24e9a124a4c9cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607C 10644 bytes

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