Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c19b7613560ff8…

MALICIOUS

PDF

43.1 KB Created: 2020-08-07 23:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbee0a70888aebade00b5177c7ba443e SHA-1: f25bae5c3e9c5e13a5107f1c04658738d2d61ba3 SHA-256: 46c19b7613560ff889264487995ede048c00cfb5e2c2ed2e10656b3f5b7dce1c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=oxford+dictionary+of+english+etymology+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is designed to host numerous external links, further supporting a malicious redirection scheme. The ML classifier also strongly flagged this PDF as malicious.

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=oxford+dictionary+of+english+etymology+pdf
    • http://files.wearyartsgroup.com/uploads/1/3/2/6/132682070/631c0b7132.pdf
    • http://files.albertaplaidgalloway.ca/uploads/1/3/1/1/131164452/kijisi_susarifutem_jixivojop_gukuwurufu.pdf
    • http://files.windsurfingreligion.com/uploads/1/3/2/3/132302987/vonarukamimafatelugi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/74282906589.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/koleguwebazamimadaxopul.pdf
    • https://cdn.shopify.com/s/files/1/0438/0426/2561/files/oxford_business_english_dictionary_for_learners_of_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0435/5797/8273/files/67252895626.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/71163873238.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9662/files/60897049743.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/garibadikipomagovemirulin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/jazuruwapitilozabaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/lodig.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/ratajegoxoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/womerinikowexife.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_off000068e0.bin
980d2c39451810b2971af9af63f0f08db6be668d8398f6d43eff5f1944c952be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 5764 bytes
font_01_sfnt_off00007c65.bin
b58170023cc19c0a7f978e340828076528361f1dc18d19d86218fdc1d01c7704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C65 10188 bytes

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