Malicious PDF — malware analysis report

Static analysis result for SHA-256 71548acdd110d560…

MALICIOUS

PDF

39.4 KB Created: 2020-08-25 16:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cb393f2b7dcd49e7fba555150b40b1c SHA-1: fc7b24d69a0ecaeb95626bb0b7f15eba9e22e779 SHA-256: 71548acdd110d5605df6eb20a9880d4e5a49ad5248c760ce1ceb0749951a2652
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=t+shirt+order+form+template+google+docs', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 't shirt order form template google docs', suggesting a lure. The presence of numerous Shopify links, while mostly benign, contributes to the overall link farm characteristic. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=t+shirt+order+form+template+google+docs
    • http://files.abmbuttons.com/uploads/1/3/1/4/131452878/zejef-werejoguf.pdf
    • http://files.notonemorealabama.org/uploads/1/3/1/4/131407148/mofajunejab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/bridge_to_terabithia_version.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rabilividobakomitunaxizug.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/hell_s_redeemer_guide_botd.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/37740710263.pdf
    • https://cdn.shopify.com/s/files/1/0439/1033/2571/files/xuwotumapitefilubidiralix.pdf
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/chandramukhi_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/vyond_comedy_world.pdf
    • https://cdn.shopify.com/s/files/1/0450/6884/5208/files/accounts_payable_in_sap.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/fosilorilapiwofakawokate.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/past_tense_simple_and_continuous_worksheets.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_off00005e49.bin
ae3e9aedd2009614b5f843e1de1911a67d6a37be120486687f7a2c8302e1a5ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 5516 bytes
font_01_sfnt_off000070e9.bin
71c10fa44067e666cf553adb2f4b8510cda2a6511f2b1c10357d0682d24ae46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E9 9268 bytes

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