Malicious PDF — malware analysis report

Static analysis result for SHA-256 6685554bf0308cae…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 01:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe27bd64f97dcc8275b72de64dae9977 SHA-1: 8e729eb9c955aa23e9bcce51a8269916a7566dc8 SHA-256: 6685554bf0308cae03723a1aa89c8d22a4905284fb8dffbbfedbefc1e3ed8e57
162 Risk Score

Malware Insights

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

The PDF document is identified as malicious due to its structure, which includes a large number of external links, many pointing to Shopify domains hosting other PDFs. One embedded URL, 'https://ttraff.cc/pify?keyword=administra%25C3%25A7%25C3%25A3o+hospitalar+livro+pdf', is known to lead to malicious redirector infrastructure. The document body, though partially garbled, suggests a lure related to 'administra o hospitalar livro pdf', indicating a potential phishing or scam attempt.

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.cc/pify?keyword=administra%25C3%25A7%25C3%25A3o+hospitalar+livro+pdf
    • http://files.lustpunch.com/uploads/1/3/1/0/131069859/6354156.pdf
    • http://files.womenssecretonline.com/uploads/1/3/0/7/130775529/mokuzepip.pdf
    • http://files.workwithstandout.com/uploads/1/3/1/6/131637385/vilirizafomoxet-gokurufodawukag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5209/5898/files/gebodal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/77598002254.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/fafoduzupe.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/rorubidikezikebafap.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/sedonatadudorezomanetevib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lexopiwalosadatijasaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/6944/6046/files/rental_payment_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/53803002079.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/93804239322.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/5684300442.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/vetuvawibitu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/murasevozukabalefipojapez.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_off00005eca.bin
4ec1d12ce3613c3a95fb75ae2785b2bcda1191361bb3072640bc8d6dfac011f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 5832 bytes
font_01_sfnt_off000071d9.bin
7a8f67737e6b7f35d79810eeca57ce65a098fb2f01c6edb1d2a9f7128d726ad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D9 12704 bytes

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