Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5563d21cd64cbcf…

MALICIOUS

PDF

48.1 KB Created: 2020-08-19 13:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b64288917e310ef92b77b3d25523f79 SHA-1: 93f71de169191c6b793aa6b65c66f170c0e0f4f0 SHA-256: a5563d21cd64cbcfa6add4b4cccb838365b3fad027240950f1fad1bdbdca34af
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a clear lure for free sheet music, which is a common social engineering tactic. It embeds a link to a known malicious redirector, ttraff.cc, which is designed to funnel victims to further malicious sites. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to improve the ranking of malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=my+immortal+sheet+music+free
    • http://logod.johnnoblebarrack.com/uploads/1/3/0/7/130775677/lefabogavabavoburoj.pdf
    • http://files.treehouse-creative.com/uploads/1/3/0/7/130739366/1454625.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/temubisevaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/desew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/document_classes_latex.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/norozowawu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4386/2181/files/dosoguvadiragejevuxo.pdf
    • https://cdn.shopify.com/s/files/1/0447/4889/8458/files/cartographic_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0451/1694/8633/files/psicologia_la_personalidad.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/7565138322.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/70898140705.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/falolefazaxapokekozopu.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_off00007d1e.bin
59a3fc61ee9dde11bc65d11a05e1bdbe41c2422f87d78b4ae11ed4d774c09f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1E 5228 bytes
font_01_sfnt_off00008ece.bin
42e9f0537d4c70bac627a210ae4775af9f9637802597b773320b975514a9aaa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECE 10704 bytes

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