Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f4491b15cb4f52…

MALICIOUS

PDF

39.0 KB Created: 2020-09-20 05:27:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84cf6f989646a1bf514a20ec00f0da2e SHA-1: 37394e8be8fc06255c24c3bf7a6424ccadc5cbec SHA-256: 14f4491b15cb4f524756fcf393dc5f4c096c9a37bf7223c77f054808746ae1b7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

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.me/wix?keyword=amazon+mayo+clinic+guide+to+stress+free+living
    • http://files.3dswebpage.com/uploads/1/3/0/7/130740249/givujowaxavivatofepi.pdf
    • http://gufezujem.arlordpac.ca/uploads/1/3/1/0/131070719/2480346.pdf
    • http://files.silveremmagray.com/uploads/1/3/2/6/132680781/kiletexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c62f45cf-7da9-4487-8212-5cd0598d5a2a.filesusr.com/ugd/7e0eb0_d92b1b2b3d50485289cf0a9c26bc4cfd.pdf?index=true
    • https://d9637bf4-c8f9-47f1-8e79-3f9286609799.filesusr.com/ugd/f103bb_4668b078e35845ca841785d2cc1d28b5.pdf?index=true
    • https://6efeb952-2415-4264-a668-9a0ace2bb1b0.filesusr.com/ugd/d7d6cd_8577ea3e5b4d4f7bb85d51d13e1a78e8.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/22354547719.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/79894841610.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0447/2160/2714/files/11477721418.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1592/files/46767061358.pdf
    • https://42217236-c2ae-4ada-9c2a-8271bd40bd1d.filesusr.com/ugd/c722c2_945061b8843d4f76b7992a3e49342db2.pdf?index=true
    • https://9287538a-8e97-49bf-82c9-3036b7b2205a.filesusr.com/ugd/daca0d_f39da0cefdf946948dd1ed3b2927dec8.pdf?index=true
    • https://8d56087f-8012-4764-9ab0-cc62be86a7bc.filesusr.com/ugd/0aab01_596a7a15bdc1489c87e4bbe661e3899a.pdf?index=true
    • 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_off0000595a.bin
94ce66cd05f0c2a8400cd9e0e7925d9eaaf0e6fbdfe7a51de766aa2815ae699c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595A 5544 bytes
font_01_sfnt_off00006c34.bin
92c562e97b61a8b5f1d877484d2dadbe6ef4f621eeeff153b56d7df93bb4ed57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C34 10384 bytes

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