Malicious PDF — malware analysis report

Static analysis result for SHA-256 e508dcb7bf0d24f6…

MALICIOUS

PDF

46.2 KB Created: 2020-07-31 11:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a26046e59acf332892b46c0c2d8c9366 SHA-1: 7eb391ad8c157128f630229b9cac47e9ff32e898 SHA-256: e508dcb7bf0d24f6ea3276ee1d9aa5291cb75ca90e96408d1ecdfcbc98b54306
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to containing a large number of external links, a common tactic for SEO poisoning or distributing malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=cateterismo+cardiaco+procedimiento+pdf', is identified as a malicious redirector. The ML classifier strongly supports the malicious verdict. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its direct lure.

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=cateterismo+cardiaco+procedimiento+pdf
    • http://files.waiapukidshomebased.com/uploads/1/3/0/8/130813448/juxij.pdf
    • http://files.leadershipacademyutah.com/uploads/1/3/1/3/131380175/jaruvibukijopefi.pdf
    • http://files.lakerupdate.com/uploads/1/3/0/7/130740078/gebokosani.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/19107817761.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/75724174573.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/semazeladanoto.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/27287496828.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/gitijomaravemexowi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/22457358729.pdf
    • https://cdn.shopify.com/s/files/1/0434/8959/1461/files/simesesar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/wukewoxunezududo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9670/files/zizutux.pdf
    • https://cdn.shopify.com/s/files/1/0440/8305/2696/files/95328728708.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/99943303417.pdf
    • https://cdn.shopify.com/s/files/1/0440/0994/7301/files/7772957234.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/pigovivulimejusizarijif.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/
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/gitijoma

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007501.bin
c47b772d297fa5ced5a12487f53d41593987283268c4eb3749f9c8bb348ef9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7501 5080 bytes
font_01_sfnt_off00008632.bin
958827410c4718646bea634c7b461b27aafa8938a42bba2a39ddec8ca01e373a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 11004 bytes

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