Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36d07b10a86b574…

MALICIOUS

PDF

58.0 KB Created: 2020-08-09 05:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b093ddd26bd11dccb02d305bc164c8d3 SHA-1: 6367007c15da635bd42100f0eb2a03a7ae7b14f1 SHA-256: c36d07b10a86b574b93349043caa51045e83ebf9987f66bb22bfa8b6f9cd6533
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning or link farms. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting a lure related to 'skin cancer journal pdf'. No scripts were extracted from this sample.

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.com/pify?keyword=skin+cancer+journal+pdf
    • http://files.oakparkbands.org/uploads/1/3/2/6/132695543/vonam.pdf
    • http://files.hereverydayrentalservice.ca/uploads/1/3/0/8/130813841/luluxalosaregaf_kodix_kipaworutefux.pdf
    • http://files.huntervalleypuppies.com/uploads/1/3/0/8/130873965/ba87f.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/plot_a_circle_in_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/43693726489.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/59006133195.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/law_of_cosine_formula.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/66858570523.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6315/files/dukedakuvej.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5400/files/mukubanikumumili.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/36832065805.pdf
    • https://cdn.shopify.com/s/files/1/0436/0844/0995/files/50595984991.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/81040329386.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/sanenipugiregudimakexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/suwobizidolapekeviw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fee.bin
be08f09593132c414b304056b569f36daf0c5a502d60a80590ee60cdac05ec6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEE 5016 bytes
font_01_sfnt_off000090f8.bin
02dbe0727be353028b77d909be8b616975c33d3676c8389c4e8a443ba2087d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90F8 11732 bytes
font_02_sfnt_off0000b75c.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB75C 16204 bytes
font_03_sfnt_off0000cc8a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8A 4324 bytes

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