Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c923eb71f66b0fe…

MALICIOUS

PDF

47.4 KB Created: 2020-08-16 16:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d814852b9c00a1d522af8c1f22944e2b SHA-1: c998451a8e97d22505caf021c01f9553ae6febfd SHA-256: 0c923eb71f66b0fe168d8acac7904bdc4f84fdcac75af33adc242f128520cd6a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.cc/pify?keyword=best+excel+template+for+inventory', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL and references 'excel template for inventory', indicating a lure to a malicious site. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly suggest a phishing or redirection attempt.

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=best+excel+template+for+inventory
    • http://files.arabianjackpotshow.com/uploads/1/3/1/1/131164032/vigakozifowi.pdf
    • http://files.huecohacienda.com/uploads/1/3/2/7/132712282/9dca8.pdf
    • http://jarol.nubianquilters.org/uploads/1/3/0/9/130969373/rakum.pdf
    • http://files.assetviewcapital.com/uploads/1/3/1/4/131407571/senagis-fezil-penekogajin.pdf
    • http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/pharmaceutical_capsules_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/17069586702.pdf
    • https://cdn.shopify.com/s/files/1/0444/4743/2871/files/maw_of_nashal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/kugurawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/59610197672.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/socrates_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/12871085759.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/nekukodopitojejajofuvinik.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/60757681726.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7976/files/8618583709.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_off00007a79.bin
2fa5b0be5cb340b52f44152488e7471d3244548c63c02dab52615a387ca069dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 5440 bytes
font_01_sfnt_off00008cf2.bin
be2e8007bd9ce6e49d67199d5fc825d2bb50edccf542ac45c1879559571dea28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF2 10276 bytes

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