Malicious PDF — malware analysis report

Static analysis result for SHA-256 09bcd3204b4f414a…

MALICIOUS

PDF

59.9 KB Created: 2020-07-30 15:35:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2269eede7f0c7b3ccffe91384bc465c SHA-1: d361bc1d73f25e5bf3ef857ff5869146e0e901ea SHA-256: 09bcd3204b4f414a72a900391a16467240ce093d4ab0725ab5437d55403cea4a
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, identified as malicious. It also features a large number of external PDF links, suggesting a link farm or redirection attempt. The document body, though heavily obfuscated, contains text related to a 'cafe coffee day case study', likely a lure to encourage clicks on the malicious link.

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=cafe+coffee+day+case+study+pdf
    • http://files.myztery.net/uploads/1/3/0/8/130874189/3506866.pdf
    • http://files.jollyduke.com/uploads/1/3/0/7/130775205/6244228.pdf
    • http://files.strangerinastrangeland.co/uploads/1/3/1/8/131857916/e80e12a8ed.pdf
    • http://files.paisanoperformance.com/uploads/1/3/0/7/130775813/luxanor-rifir-xododujifox-pidemaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5223/5938/files/lifetipupevufixidudigor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8917749958.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/75060153328.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/lemaberidemi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/sopeminivositi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/rumazugujodugibuweroxud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2783/2733/files/sinitumejimopiluxevur.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/33888514187.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/155877274.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3376/files/87482152867.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000985f.bin
2a995402ec7d24668213ad44f0b8ff9d991ad1e2402ff844124aae6130788877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x985F 4876 bytes
font_01_sfnt_off0000a90f.bin
dc9e9d72817a6dc33adbd040a951d9f9336309c81419e05d393ca0458dcc7644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA90F 10508 bytes
font_02_sfnt_off0000cd32.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD32 16164 bytes

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