Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1b1bb255a2d7a6…

MALICIOUS

PDF

63.5 KB Created: 2020-08-06 09:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5834ea6611b39dafcedf322a7b13bb44 SHA-1: 8cbfc9248836cd0740cb9669f2d65b9b745b7dbb SHA-256: 6d1b1bb255a2d7a6d7a21b12410904a4d1a35dfa4794af6ab752ba692167fbe5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm designed to improve search engine rankings. One of these links, 'https://ttraff.ru/pify?keyword=critical+participatory+action+research+pdf', is identified as a known malicious redirector. The document's structure and the presence of these links suggest a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

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.ru/pify?keyword=critical+participatory+action+research+pdf
    • http://files.manilabaptistchurch.org/uploads/1/3/1/3/131398135/70f8d8857f8f397.pdf
    • http://files.downtownfirst.org/uploads/1/3/1/6/131606815/21ec48e18ceaee.pdf
    • http://wotuz.theweddingstationeryboutique.com/uploads/1/3/2/3/132302782/fovesiresuzuxu_zefagosem_jopudofu.pdf
    • http://files.laroaevents.com/uploads/1/3/1/8/131871424/sanuvilefuzofur_pejejoliv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/dr_bruce_lipton_biology_of_belief.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/76287585300.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2189/files/21193296898.pdf
    • https://cdn.shopify.com/s/files/1/0449/2463/3243/files/html_to_generator_c_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5139/1907/files/zalifotud.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/linoxemawoxofogibokazaj.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/68875698208.pdf
    • https://cdn.shopify.com/s/files/1/0435/5178/5109/files/ronodexaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/koduwaraje.pdf
    • https://cdn.shopify.com/s/files/1/0435/7508/3171/files/12418344058.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/recent_college_graduate_resume_examples.pdf
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/astm_e83_16.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1991/files/44517897937.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0745/files/lodoxukizerat.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_off0000bbcf.bin
864ed10f693574127e2a899e3edd3f0ae5477d9aa3f530a1f0c76b1bd87aaf7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCF 5248 bytes
font_01_sfnt_off0000cda8.bin
8a97a805e09a7a4aa9210f4e7132ba24458e8e05b589d7a19799374814a48405		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA8 10144 bytes

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