Malicious PDF — malware analysis report

Static analysis result for SHA-256 13f7fb26edc6cb7a…

MALICIOUS

PDF

34.5 KB Created: 2020-08-19 09:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52b2fb8b298374c7fec35ad7b9745f0a SHA-1: 01c54e68a8403f81cc8e575231e0defaa4f8ad59 SHA-256: 13f7fb26edc6cb7a135656a24153890db11f1ffd64ac50c0ee65c57513776bd9
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed to manipulate search engine results. The primary malicious URL identified is https://ttraff.cc/pify?keyword=banyuls+sur+mer+tourist+information, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to tourist information, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.cc/pify?keyword=banyuls+sur+mer+tourist+information
    • http://files.nodaysoffalthletics.com/uploads/1/3/0/9/130969158/vazujalu.pdf
    • http://files.monicaleekennedy.com/uploads/1/3/2/8/132815054/672857d1.pdf
    • http://files.raffles-galore.com/uploads/1/3/1/6/131637570/b46d65adcef53e5.pdf
    • http://bebul.affirmativeresearch.org/uploads/1/3/1/4/131437089/wefojibu-fenijefaxex-pedato-lurudavipoxu.pdf
    • http://zofemafu.baketoplay.com/uploads/1/3/1/4/131408159/tizil_laluja_kurutor_zidosekoririx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1010/5244/files/candelaria_tenerife_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/ruvidekeva.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/padma_bhushan_award_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/negimikegadusolopule.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/newivinetodeladidisoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/josofixobe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/jurnal_psoriasis_vulgaris.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/nawupomilew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/girotimovu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/tagaditasezewedubus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/biwojesezetunuriladax.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_off00004bad.bin
a3316271b1fede099c0caf68661435292ced69fec66c1f590647ba7aebbf8be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAD 5064 bytes
font_01_sfnt_off00005cd2.bin
7b92329521e65eaf57f69eca513713858c6cd76bdd209622882d4cd82d2d4319		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 9464 bytes

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