Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcff4ba45435e602…

MALICIOUS

PDF

43.0 KB Created: 2020-08-09 17:18:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25a6c26fdf08a38f78a507e0192a175 SHA-1: 70a2baac8fe9a642c0326e40c72f67374cb378e0 SHA-256: fcff4ba45435e6020a14d86df0c5a2a3ec6f21eec781a70a44c8c01d698b71ee
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The primary malicious URL is https://ttraff.cc/pify?keyword=revista+boticario+pdf+ciclo+4+2020, which is used to redirect users to other potentially harmful content. The document body, though heavily obfuscated, contains text related to a magazine and the authoring application, suggesting a lure to disguise the malicious links.

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.cc/pify?keyword=revista+boticario+pdf+ciclo+4+2020
    • http://bozigo.projectshowup.org/uploads/1/3/0/9/130968921/rasaxo-nofimikef-fubofejigosa.pdf
    • http://files.fixfaithsfemur.com/uploads/1/3/2/6/132681690/rileban.pdf
    • http://files.drewshanefield.com/uploads/1/3/1/6/131636890/sivetuvepixa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8642/0891/files/algorithms_and_data_structures.pdf
    • https://cdn.shopify.com/s/files/1/0437/1546/1275/files/domeduvipagezit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/81892002240.pdf
    • https://cdn.shopify.com/s/files/1/0434/4302/8120/files/xezaxelozadilapixige.pdf
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/lemijalatajupigum.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/64065894101.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/tatazizagila.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/tnpsc_group_4_aptitude_questions_and_answers_in_tamil_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/litolagilixiwot.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/50914704402.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/android_pager_adapter.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/davajisosabopimij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/91233081046.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c60.bin
ced6326b95a31aba6f5c62f86a3862c9d899ffb3e7243cbca65942d41935a23c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C60 5400 bytes
font_01_sfnt_off00006ed3.bin
cc4a68d2566772df92fc0fd206ad1c25140caa82ef24bac6803cd35b88ef83b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 10020 bytes
font_02_sfnt_off000090e7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E7 4324 bytes

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