Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac10d85082ab835…

MALICIOUS

PDF

54.0 KB Created: 2020-09-16 15:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0384bb8f7085ce0c35df00eddd585f1d SHA-1: 345690b8ff1469a2427dea0c4ddf53ec73edda16 SHA-256: 0ac10d85082ab835308e72bb368facac1c1886f92b998fcbea3716933290fefb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs, many of which point to link farms. One of the primary URLs, 'https://ttraff.club/wix?keyword=capital+city+hockey+league+fredericton', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or redirection attack.

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.club/wix?keyword=capital+city+hockey+league+fredericton
    • http://files.susancontini.com/uploads/1/3/1/4/131453555/mevudomavi_resopegubaj.pdf
    • http://mukukupap.leonradu.com/uploads/1/3/1/4/131453329/ruxabatibofuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://571ab5bd-f1a1-40d7-81da-bfa8395d40ac.filesusr.com/ugd/89064d_bb062134b9f742c892ee8fd0ee9d65be.pdf?index=true
    • https://21fd8470-4682-42cb-b25f-9bc0d726b444.filesusr.com/ugd/29c71c_22d0a2cd1799428bac43f57311a9fe69.pdf?index=true
    • https://2da9dcb8-9e6e-4622-898c-105837280d26.filesusr.com/ugd/9ea91e_8076590b78cc4ca3a9493a086043b0a6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/15382262478.pdf
    • https://cdn.shopify.com/s/files/1/0464/8216/1832/files/82112867231.pdf
    • https://cdn.shopify.com/s/files/1/0460/9608/9252/files/wanezikopujevulis.pdf
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/40755376231.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://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c1.bin
51ab6905290750564d90708e7631dedb146f5386d6918388d3b3373a2b20f6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C1 6476 bytes
font_01_sfnt_off000070c7.bin
77134175bb5f4f1e19366191cd6dcdddb3336e4017358140fb6e94d4e928c104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 5312 bytes
font_02_sfnt_off000082da.bin
dc450d55df06b5f0a68d23fbc0d069889e59af0d3b1b0b3f0cd7ba9263b923aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DA 10832 bytes
font_03_sfnt_off0000a7fd.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FD 16036 bytes
font_04_sfnt_off0000bc67.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC67 4324 bytes

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