Malicious PDF — malware analysis report

Static analysis result for SHA-256 db23f0a461c0ea24…

MALICIOUS

PDF

44.2 KB Created: 2020-08-30 20:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 349e4cf0ca10363f7745f23eacda0f6a SHA-1: ccd4e5f8baa21aaf856c46dcf196daa2d3e2355d SHA-256: db23f0a461c0ea244fed1c47b74ee3fae99a8549a06940f956f7af940b1b891b
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links directs to a known malicious redirector, indicating a phishing or malicious content distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=luxe+calme+et+volupt%2525C3%2525A9+henri+matisse
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/academic_writing_skills_3_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4155504299.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/piporavaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/rurakajukiwozanuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/2024/6427/files/fotenewijobid.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/public_autopsy_reports_florida.pdf
    • https://cdn.shopify.com/s/files/1/0429/1418/5372/files/mu_origin_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/33941086170.pdf
    • https://cdn.shopify.com/s/files/1/0463/6842/4091/files/jokugibimat.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/jixosiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/jojakasegakidisurefezeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/56515220257.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/69489927889.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2882/files/fababuzetirofafo.pdf
    • https://static.usrfiles.com/ugd/d3758e_b5d3b28ead4d45cda12378d27a5ddd69.pdf
    • https://static.usrfiles.com/ugd/2274a7_6c60657c526a4392a97568b2b1735d7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4b27a19a9c04f3e986963b242c21e9b.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_off00006d26.bin
61d2b0f42e0f5cc7a23cc307a126e74d09e70b0c0c0d18942082ca0117f5df4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D26 5384 bytes
font_01_sfnt_off00007f12.bin
d383ae38ee946f086af6621fc9cb6e45875380dafa5d9ff2211644e127f7e878
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F12 10076 bytes