Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fc0f51e848d3a2…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 23:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e81f27115796db7422235b676a78089 SHA-1: 23db2810580e27c6bf366ead928d08b6b6baa0d9 SHA-256: 69fc0f51e848d3a224f364be56aedb520c3b4bd0a8fb68da1cd203a08380a8b1
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body also contains a URL that points to a potentially malicious redirector, disguised as a link to a PDF. This suggests an attempt to lure users to malicious infrastructure, likely for phishing or to download further malware. No scripts were extracted, but the presence of numerous links points to a link farm or redirection scheme.

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=fallout+4+locational+damage
    • http://files.billedkommunikation.com/uploads/1/3/0/7/130775607/1688115.pdf
    • http://files.kiuyanran.com/uploads/1/3/2/8/132814791/nuvewojowajogit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2552/3103/files/kiki_challenge_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/6827/7404/files/pupanizosopixopadomupugov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/english_words_and_their_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/venom_vs_carnage_comic_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0436/0817/8850/files/99200452414.pdf
    • https://cdn.shopify.com/s/files/1/0464/5004/9192/files/3d_reader_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/xunofobodafawole.pdf
    • https://cdn.shopify.com/s/files/1/0463/5338/3581/files/guacamelee_skin_pack_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/34762479972.pdf
    • https://cdn.shopify.com/s/files/1/0435/8982/8771/files/cembre_cable_lugs_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/1002/2814/files/adidas_men_s_sizing_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/govamafexatotelija.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/pujigomadinomisumuronimo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/62311438531.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_off000067eb.bin
b5c98e95babec0192a701a682507854524a0aff3de0b10d2f614bd2c96da9b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EB 5028 bytes
font_01_sfnt_off000078f5.bin
04f4d60487c6970dc40aea44aa872764c6b29f37fe0ab92479cf0f368375a12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F5 10140 bytes

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