Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b68aa50c87be99…

MALICIOUS

PDF

32.9 KB Created: 2020-08-29 01:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d06d416a67b4415da3c8678f8d3b78 SHA-1: 09e7d56e481ef9deb9a0eb819abc7b1bb9af30f1 SHA-256: f6b68aa50c87be99ae457164af425d0bd862e96333e71d7ff3d086fbbd06c7f9
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The presence of a large link farm suggests an attempt to manipulate SEO or redirect users to malicious content. 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/wix?keyword=wheel+of+theodorus+art
    • https://static.usrfiles.com/ugd/b8c837_95797f8b807143c5af5fd41e7d5949e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_794720be077449388cd86d87b8f395c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_52db3154e7c3442d9f3b20996c601b15.pdf
    • https://static.usrfiles.com/ugd/b8c837_1efd6712ad2f4dc89fe8337ef8203db9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/32780316821.pdf
    • https://cdn.shopify.com/s/files/1/0440/2357/8774/files/sr_71_blackbird_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/95639975099.pdf
    • https://cdn.shopify.com/s/files/1/0437/7480/4126/files/astm_a370_latest_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/27757519208.pdf
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/86803470854.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/sample_html_file.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/gagigigaxunonavenisujaf.pdf
    • https://cdn.shopify.com/s/files/1/0453/8669/4824/files/catalase_assay_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/4848144853.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/tijaxu.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_off0000463f.bin
3200c385e45828e16ded9bc254a354b7ec81e1e803f77aaa280626cdfd39be15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x463F 5008 bytes
font_01_sfnt_off0000574e.bin
49a6b22b2307de22675cb9713ec4a99090a886371467cdb9da22428d6ae4e513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574E 9276 bytes

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