Malicious PDF — malware analysis report

Static analysis result for SHA-256 0895178799281455…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 21:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 224c41b3700fca17b3ca860ab0d8db1e SHA-1: 01f023581c42e1d7c5716983edaa68e89ca1e9cd SHA-256: 0895178799281455a9ab2c6a6f9981ea9faef98bcb7fc202861465b02086cc56
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to potentially harmful content. The document body and heuristics indicate a lure for software downloads, specifically mentioning 'spintires download for android'. The presence of numerous external links, many pointing to PDF files, suggests a link farm or SEO manipulation tactic to increase visibility for malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=spintires+download+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_67869d0b1a424653b7b6877be0e9f2df.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4070b95493a40ac9285ce3d84f40896.pdf
    • https://static.usrfiles.com/ugd/2e16aa_d782a122b1e74288bc90d6b9d94cbed3.pdf
    • https://static.usrfiles.com/ugd/191a6d_c07e80deece2421b8c9b96d457319123.pdf
    • https://static.usrfiles.com/ugd/b8c837_1868644f22254e8fa3d860ac5f3c841c.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/59056032776.pdf
    • https://cdn.shopify.com/s/files/1/0432/1073/5780/files/bazomuxosubekixixusozefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3418/9734/files/jibodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/agada_tantra_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/miriluxul.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/69098910858.pdf
    • https://cdn.shopify.com/s/files/1/0440/1741/8405/files/rotate_a_matrix_by_90_degrees.pdf
    • https://static.usrfiles.com/ugd/b8c837_e79c0f4815e3483199cd39ad8e361528.pdf
    • https://static.usrfiles.com/ugd/b8c837_39f0f66d1d6e4fa6876cafb002f957c2.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc1ee5ea73794072a29555a88c2553cf.pdf
    • https://static.usrfiles.com/ugd/d1d005_b8ffef8cbce041fba20627761decbcda.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006747.bin
d74ca084c3268727b7519b32cdb1c9099c0d623f06d26ed087ac495e359bae8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 5232 bytes
font_01_sfnt_off0000792c.bin
6f849f36e4b409ca629844994d21d52ba5042d1e12a47f64885c7aed87cdd334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 9964 bytes

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