Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc4c6401b2cd56a…

MALICIOUS

PDF

51.5 KB Created: 2020-08-28 01:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4bf7a9882c4e506be5b4c9d4db4b08f SHA-1: 812f3814415d6512bcf1dcccdbd84fb5266617d4 SHA-256: 9cc4c6401b2cd56aacb0bb3171f08660db46aa370c0664e81765895c8c29c504
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though partially corrupted, includes this URL and references 'Firewood permit colorado 2019', suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector or distribute further payloads. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=firewood+permit+colorado+2019
    • http://files.atlantadentalanesthesia.com/uploads/1/3/1/4/131455883/najikenusapijevofifu.pdf
    • http://vaniwezi.65thstreetnj.com/uploads/1/3/0/8/130873804/rewaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99744184538.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/gofexowom.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/7th_grade_math_worksheets_with_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/9531704046.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/adele_skyfall_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9320/files/48690326847.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/90398556625.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/49343218299.pdf
    • https://cdn.shopify.com/s/files/1/0460/1656/1319/files/green_beans_growing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9811/2167/files/93722337343.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/zolimavufebanebijoza.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_off00006209.bin
804f0a1aefdeb62470276fccd8a67c1fdfc1fc1fb9c628d33aa9816fb9b9d665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 5572 bytes
font_01_sfnt_off000074f4.bin
2b17894289ef4ac549ca5ccbfe538e6ebde94701791c0542cba9a71f2d67f349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F4 2268 bytes
font_02_sfnt_off00007f07.bin
38c3fba0628e1b374c36a70845d734d230b00b3d47e55ffd9c7c21cde7862f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 13328 bytes
font_03_sfnt_off0000a9dc.bin
844fb27054059bbe8e24107f7623dfc8b3714af0429cc888d8296577745ef093		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9DC 16208 bytes

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