Malicious PDF — malware analysis report

Static analysis result for SHA-256 050fa9369b638396…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 01:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4495af4ef678632a54758d505b2af2cb SHA-1: f48b2a0bd112a08c6eec68e099f0873c42d747ee SHA-256: 050fa9369b638396a802caf3fd35c9a0c4dd836969e6d0de046386999151c2e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, with one prominent link directing to a known malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of many Shopify-hosted PDF links indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent.

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=how+to+speak+american+english+like+a+native+speaker+pdf
    • http://files.lafayette-rotc.com/uploads/1/3/2/8/132815806/razuxis-fujivumarof.pdf
    • http://tevesajo.maladidaho.org/uploads/1/3/1/8/131872225/5a2ba56bd5b63.pdf
    • http://giluf.mini-mutts.co.uk/uploads/1/3/1/4/131453177/9b59ce26.pdf
    • http://files.carsesus.org/uploads/1/3/0/7/130739212/kefejelediganax-marixavuja.pdf
    • http://files.annemckeestoryteller.com/uploads/1/3/0/7/130775002/b935ccafc61a89d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/98864683460.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/volifip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/94204242831.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/18453641658.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/38325551260.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/42998173376.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5967/files/betty_schrampfer_azar_understanding_and_using_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1660/files/nunuse.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/famezutowinalutofimuzib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0611/files/wumanelited.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bibekejufalakudogaloseja.pdf
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/cell_differentiation_notes.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_off00006584.bin
93f0b75c336163690ca6621dbf7b194920ea8402ff2f0b0966bcd58b9ba0f12c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6584 5748 bytes
font_01_sfnt_off000078fb.bin
2cf60bd3ef92dff6d2670d75959c2c4cefe9f6e885f52dff293f8edbc688ab59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 9932 bytes

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