Malicious PDF — malware analysis report

Static analysis result for SHA-256 6619400d36f41641…

MALICIOUS

PDF

47.1 KB Created: 2020-08-17 04:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ced7f4a2bff01c677fd26503c772aaf6 SHA-1: c5e10d9e4612006e6714e18e1a278bdb5ee67d1a SHA-256: 6619400d36f4164177f4ace3294b75752fa93d7adfcba28294a5bc75c5414053
162 Risk Score

Malware Insights

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

The PDF contains embedded links and a call-to-action phrase suggesting a download lure. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=autodesk+2013+64+bit', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to software and a URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=autodesk+2013+64+bit
    • http://files.heracleous.org/uploads/1/3/1/3/131398488/2812021.pdf
    • http://files.tristatemodelers.org/uploads/1/3/1/4/131453028/9644159.pdf
    • http://kuzemosi.umacenter.com/uploads/1/3/1/4/131482822/midolaxigi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/2715/8424/files/xexinopuxekijokos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/crosfields_school_reading_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/vodagowit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/aprender_frances_completo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/492247067.pdf
    • https://cdn.shopify.com/s/files/1/0437/4528/0161/files/human_biological_and_cultural_evolution.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/woxegewox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50036278562.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/rules_by_cynthia_lord.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/rehearsal_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/sales_and_marketing_techniques.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d57.bin
d3a16f6e117b2104972e41d94ef73e8fd236dd190ccfc2eb27eb43a52b1bb6dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D57 3936 bytes
font_01_sfnt_off00006b81.bin
b6ab07c61839730b7b441e315b9c12c8e8cae1efb83c21dd7b1664255f8720f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B81 5184 bytes
font_02_sfnt_off00007d38.bin
79d58f789876415a5847ea8a821d20e6d85a413591c6dff0e2142c09e9bd3748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D38 10540 bytes
font_03_sfnt_off0000a15c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA15C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.