Malicious PDF — malware analysis report

Static analysis result for SHA-256 1322428a8e0af908…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 00:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fb4a76a156cb14e201a4fd006e1a497 SHA-1: 9ab5939741250fbbd48a10f6458fcdd0ae631dcd SHA-256: 1322428a8e0af908d1d0cdb1c1f09c981142945112db9880284bb641a4278f6f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=jboss+application+server+architecture+pdf', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content, likely for 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.ru/pify?keyword=jboss+application+server+architecture+pdf
    • http://files.ginny-frings.com/uploads/1/3/1/4/131406701/kusodal-bisad-kiwitamufeloxi-puvinof.pdf
    • http://vodesap.vincentbaldassano.com/uploads/1/3/0/7/130776791/vefudeziduta.pdf
    • http://files.darkhorsegolf.com/uploads/1/3/1/0/131070105/turafobopetinowan.pdf
    • http://files.vernonrive.com/uploads/1/3/2/6/132681670/zamabowakijogo.pdf
    • http://files.dallasteapartyco.com/uploads/1/3/0/8/130813782/1152823.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/95275397872.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/aprendizajes_clave_historia_educacion_secundaria.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/8921824882.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/xexamageluvuvaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8086/8255/files/nopulufajupasixi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/wadifovuju.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/nonverbal_communication_definition_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/powasitefixurop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/centrifuge_machine_function.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/case_files_pharmacology_download.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_off00007004.bin
9a93d591b72665b97636014d830a0ddd8209998351fa9716e4f72280cb2ed898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7004 5432 bytes
font_01_sfnt_off00008278.bin
56dce7d90159ed72bc286804a65443b64b011f5705b00bf8cceb7ae6d5cfeaee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8278 10144 bytes

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