Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc216062f452f4c…

MALICIOUS

PDF

39.5 KB Created: 2020-08-04 11:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf05a3543641f1101d0243b45bf6d08 SHA-1: 65f844bb982065bd5c7b17179f01825b3379131a SHA-256: bbc216062f452f4cde6588282ed209b3ab81d3065aefe8fbdcbbe019bbd56b58
150 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'DSM 5 criteria for bipolar disorder pdf'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=dsm+5+criteria+for+bipolar+disorder+pdf
    • http://files.dentalstorylab.com/uploads/1/3/2/6/132682802/5449536.pdf
    • http://files.michaelbrownslawoffice.com/uploads/1/3/1/4/131406762/xajixolaxexojobegu.pdf
    • http://files.bulverdepregnancy.com/uploads/1/3/1/4/131453674/5956165.pdf
    • https://cdn.shopify.com/s/files/1/0431/9507/2673/files/69205876838.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/52397289038.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/49503296140.pdf
    • https://cdn.shopify.com/s/files/1/0432/5035/2296/files/ledisuvaxoxewe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4396/1494/files/tofutumorubamovarojojebil.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/bakamazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/lojinolilirunimuvagaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/21693962409.pdf
    • https://cdn.shopify.com/s/files/1/0432/1558/5448/files/fewisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/zatutekobiveb.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_off00005d3c.bin
b86208dff8d424d41e11624b5630364c4e4bad62a0ba9dc06dd04403035efaff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3C 5564 bytes
font_01_sfnt_off00007011.bin
3b4199df24ab68701670e4303c183451cf0c203fe9fee49f9bb84c5be6ad6dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7011 9776 bytes

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