Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e6e27394ae94a0…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 17:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39834b15e6d6f214289b63f1bfc874a1 SHA-1: 4f69ace09e0a9a9fea000e97df5cc7ac3f8fb351 SHA-256: 39e6e27394ae94a05e5fd04874f4b0e0e404c57878288c6891ccd65b724a29a5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'ibm x3650 m4 server guide iso' and the malicious URL itself, suggesting a lure to download or access potentially harmful content. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting the malicious intent of redirecting users.

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=ibm+x3650+m4+server+guide+iso
    • http://files.cynthiahovdaphoto.com/uploads/1/3/1/0/131070152/boraluwalajiva.pdf
    • http://files.shayaanacademy.com/uploads/1/3/0/7/130775396/8801146.pdf
    • http://files.olivia-a-ramos.com/uploads/1/3/0/7/130775498/138025.pdf
    • http://files.sttheresefoundation.com/uploads/1/3/1/4/131437924/a37693873.pdf
    • http://pepom.margaretglaeser.com/uploads/1/3/0/7/130740444/af3b304cb5.pdf
    • https://cdn.shopify.com/s/files/1/0432/7112/7208/files/pawudotikagenufapow.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/multiple_markers_with_infowindows_google.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/ludoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0899/files/juvijinijareli.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/kebatafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6428/6618/files/ableton_live_mac_free.pdf
    • https://cdn.shopify.com/s/files/1/0453/9108/5736/files/tudirewoxejisegunomulatov.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8589/files/rig_veda_in_tamil_translation.pdf
    • https://cdn.shopify.com/s/files/1/0434/1291/4332/files/free_online_editor_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/82326505908.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/xemelavevikawezabogov.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9658/files/16599363886.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_off0000624e.bin
71cf328ff6a580bc0fc2fc963395d4304ef63ef02e57b513db964d4aaf908e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624E 5780 bytes
font_01_sfnt_off000075eb.bin
b5504f9b30bb03e537e76862c47d35c31a78f1b213d29f5f0e019eb012514445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EB 15104 bytes

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