Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e978f7986547590…

MALICIOUS

PDF

69.0 KB Created: 2020-08-11 23:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b7c06a5b01db9848c8b8e13b14bd003 SHA-1: 8c90e3ec14bb60eabe39b833ff3e77136c702844 SHA-256: 5e978f7986547590a68a513e273bb10f6fc80638842304813b02e06fbd2e15f7
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed to host PDF files. One prominent link, 'https://ttraff.com/pify?keyword=attributes+of+a+leader+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=attributes+of+a+leader+pdf
    • http://files.pamelacarr.com/uploads/1/3/1/4/131453867/zelufotevif.pdf
    • http://files.emilyrbarratt.co.uk/uploads/1/3/1/4/131453944/a4e7ed7509af5.pdf
    • http://files.yellowelemental.com/uploads/1/3/1/3/131397981/vapilerup-fivokavikur.pdf
    • http://files.millertravelcompany.com/uploads/1/3/1/4/131482864/bemuxomulexi-lojimolenevasa-bidigu-sexudi.pdf
    • http://files.gwoodfoundation.com/uploads/1/3/0/7/130739202/11743262.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1572/4456/files/sasofawizow.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/lopisixidominiwapozex.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/70480891723.pdf
    • https://cdn.shopify.com/s/files/1/0440/2534/8261/files/99_names_of_allah_in_arabic_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5321/2057/files/45258898175.pdf
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/honda_v65_magna.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/41009680655.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/bixojovejagoxagumojexiseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/27698237065.pdf
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/20819060814.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/kodifutenetozeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/gugujas.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/90192407036.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_off0000d0dc.bin
e51964850d3661741a524af1d41881536c2bf74a79890de7d07f80f83f3b77e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 5164 bytes
font_01_sfnt_off0000e271.bin
671e390d4b122224c95a52dcd1d04b5d65d9e0bcff235584af2f5832a3386b3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 10540 bytes

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