Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c04df9e7d2454d2…

MALICIOUS

PDF

79.1 KB Created: 2020-11-28 18:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b752f5a5067c41d99e5b8e48f04e0212 SHA-1: 1d8e4ca7d6243dd871cce46169376c06f1974a16 SHA-256: 6c04df9e7d2454d24867f56f00c888ae5ff0b74e76ee545413f414fb3a63fbcf
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. One of the linked URLs, 'https://gettraff.ru/aws?utm_term=apex+launcher+classic+apkpure', is flagged as a malicious redirector. The presence of these links suggests an attempt to direct users to potentially harmful content or to manipulate search engine results. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=apex+launcher+classic+apkpure
    • https://vijunefuk.weebly.com/uploads/1/3/4/5/134588972/5097141.pdf
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/podufolagevonu_moxedogepulakus_rutapud.pdf
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5fa6bfecdeec7.pdf
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/sobilo.pdf
    • https://cdn-cms.f-static.net/uploads/4456372/normal_5faf4aafc7230.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/netinuwa/whatsapp_mod_apk_2018_ultima_version.pdf
    • https://uploads.strikinglycdn.com/files/f4baf25a-a645-43a3-8d03-60c853e0743f/36197880235.pdf
    • https://s3.amazonaws.com/wixamupelinere/10124510377.pdf
    • https://uploads.strikinglycdn.com/files/6168f30b-90e2-4e85-aaa3-6a60f3d15009/posaxa.pdf
    • https://s3.amazonaws.com/luxelula/goser.pdf
    • https://s3.amazonaws.com/jofunozuzof/86555862837.pdf
    • https://uploads.strikinglycdn.com/files/1582ebfd-3b9d-40ff-9731-df143014c5ae/freemie_independence_breast_pump_no_suction.pdf
    • https://s3.amazonaws.com/susopuzupure/watch_cowboys_game_live_stream_online.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000baf0.bin
b168d46c9535a1df529b274f538a7ededda28f33087b0f06a166863a5199dad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF0 5140 bytes
font_01_sfnt_off0000cc61.bin
4a070dd2624cbd1dcb1cb1dc2c63e3fa2da87458af9fab256e6c0e7cba6f5663		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC61 12056 bytes
font_02_sfnt_off0000f3d5.bin
74601b00bf8ced7d4b9b480e41bbfd8fb51ec8f9306c55119b3f19c61d0af4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 10552 bytes
font_03_sfnt_off000117f9.bin
7aecae6c613013dc2cbf2f76b1acac8e8725a6b71d8652b68dc60a560bf2ebde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F9 16600 bytes

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