Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45c302c0cbb9fa6…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 23:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1c7e9a5aae9ccaca8c2f5f937be5e4c SHA-1: 73c3f1d1d59e921cb2ed6ff17ee614742fabd1e2 SHA-256: b45c302c0cbb9fa695b2008d8fc43b6097b04607b5cbf3e96b7911fc26ba6633
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a practice PDF. The ML classifier strongly indicates maliciousness. The document body contains obfuscated text and multiple embedded URLs, including a primary redirector to ttraff.com. This suggests the document is designed to lure users to malicious sites, likely for further exploitation or credential harvesting.

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=vernier+calliper+reading+practice+pdf
    • http://files.jackmoline.com/uploads/1/3/1/4/131437291/6733003.pdf
    • http://files.kkylambdapsi.com/uploads/1/3/1/4/131453252/9354279.pdf
    • http://kuroreke.avirityogastudio.com.au/uploads/1/3/1/6/131637136/2330210.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/netefamog.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/kepubebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/sword_modifiers_tinkers_construct.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/50229839784.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/equivalent_resistance_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/addition_and_subtraction_of_fractions_worksheets_for_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/vasivupukerumasemobujum.pdf
    • https://cdn.shopify.com/s/files/1/0443/1734/3900/files/chrono_trigger_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/42988856413.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/vajoridulewometikepewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/14839134156.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/67265306264.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/31495401010.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/fipisotexagi.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_off00006fe2.bin
a85b006db062574aeb66f09334b63798c69d69abd44509cfb056c205c6408dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE2 5112 bytes
font_01_sfnt_off00008162.bin
f1c556af9effaef387df7c0860eb671610e771fd48762854a0e384b7ddca2cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 10224 bytes

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