Malicious PDF — malware analysis report

Static analysis result for SHA-256 692502b8812c2fdd…

MALICIOUS

PDF

50.1 KB Created: 2020-07-30 12:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ff79cdc7b1c4fe2cca9777b198f10f4 SHA-1: 7dc9c69e5d48f02272e182ef50a4a3395b9b2a10 SHA-256: 692502b8812c2fdd79ee358548fa35fe06c9e8540fd33de664b85968d559cfcb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a coordinated effort to manipulate search results or distribute malicious content. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely related to phishing or malware distribution.

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.ru/pify?keyword=all+out+war+tim+shipman+pdf
    • http://files.fullmoonfarmnc.com/uploads/1/3/1/4/131437949/5639821.pdf
    • http://files.kayenaturalbeauty.com/uploads/1/3/1/4/131438405/3071925.pdf
    • http://files.colormeredpoodles.net/uploads/1/3/1/3/131380299/lirapivimugexurix.pdf
    • http://files.anglicanparishgisborne.org.au/uploads/1/3/1/4/131407802/34aebdc.pdf
    • http://files.clinicalambassador.com/uploads/1/3/1/4/131438397/6549405.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1992/6679/files/zowanilufud.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/84954864084.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/74199520792.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/14824048465.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/mawevikifasalexopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/41105845627.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/30249875756.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/segas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/36723305925.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/sipolufosivamaxobugez.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_off00008668.bin
382dcd33923e9f587ab0549be348ef40954b0021d2cf6818d9136673e165cab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 5128 bytes
font_01_sfnt_off000097b7.bin
c4cd6467bf65633d1d2698122f54a75961c2e6b28e0c6f8f173216b92367cd90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B7 10508 bytes

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