Malicious PDF — malware analysis report

Static analysis result for SHA-256 d129275de07ab0c1…

MALICIOUS

PDF

55.0 KB Created: 2020-08-19 16:45:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3e68593f1a3e66627783f084711897 SHA-1: 55fa52c47826471b029b176cc11c9467a19666f3 SHA-256: d129275de07ab0c196d86823d877787d354fb9fb16c7da58214fc6a1c09dbfcb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a search result for free movies. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or distributing malicious content. The embedded URLs suggest a phishing or redirection attempt to a malicious site.

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=malayalam+movies+2019+free
    • http://files.vivavocestyling.com/uploads/1/3/1/6/131636951/770421.pdf
    • http://favaluso.centurybarnweddings.com/uploads/1/3/1/3/131383839/jisib.pdf
    • http://files.foxylockshairextensionsaustralia.com/uploads/1/3/1/0/131070604/dawaxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9449/9743/files/66132903571.pdf
    • https://cdn.shopify.com/s/files/1/0430/9899/6889/files/40592538498.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/lidigake.pdf
    • https://cdn.shopify.com/s/files/1/0438/9126/1595/files/winter_colouring_sheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/xapated.pdf
    • https://cdn.shopify.com/s/files/1/0429/1064/6435/files/kepokojix.pdf
    • https://cdn.shopify.com/s/files/1/0432/4576/4770/files/38650145046.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/juwimugaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/mokosufepedepax.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/lifixakazijidedakupenubub.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/analytical_techniques_in_inorganic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0430/5544/8213/files/foweze.pdf
    • https://cdn.shopify.com/s/files/1/0439/5902/5822/files/vorekipidebakawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/49048921735.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009705.bin
ba42c84135a28fe7d4fac3ba0dcb8d20cc04be5b65dcbc9004d13554fc9ea8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9705 5564 bytes
font_01_sfnt_off0000a9f2.bin
2b68abaef644c8150e96b5f2b6ecb38d26795d610c67a883935074249ef60b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F2 10392 bytes

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