Malicious PDF — malware analysis report

Static analysis result for SHA-256 1097804dadf47b2e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-13 15:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d612d7f32549fda00c075fb96f5205a8 SHA-1: 1c4ebbe99f83da68db174466453aa6d0862475ba SHA-256: 1097804dadf47b2e070dc5a8edfbdc035369ea8e8ac61aed28ec4826fbe57980
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify-hosted PDFs, likely as part of an SEO link farm. One of the primary links, however, directs to a known malicious redirector. This suggests an attempt to drive traffic to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, and the document body was heavily obfuscated.

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=plautus+aulularia+pdf
    • http://files.ten21lacrosse.com/uploads/1/3/1/6/131606878/delexofifuz-jewesu.pdf
    • http://files.cobberdogsontario.com/uploads/1/3/2/6/132681303/numevenidovizuwegeme.pdf
    • http://nokisof.armedforcesmedicine.com/uploads/1/3/1/0/131070450/3135582.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/bromberger_blutsonntag.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/natazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8669/1998/files/dotugomepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/fevawutubazizufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99203043279.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/63664934928.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/77039603021.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/tagiwejonuvewekodow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8579/1393/files/72620008068.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/base64_to_converter_java.pdf
    • https://cdn.shopify.com/s/files/1/0438/7841/6539/files/resultfirstryan_gmail._com.pdf
    • https://cdn.shopify.com/s/files/1/0439/1203/6520/files/87438465165.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/wogagobetozufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/sondaje_vesical_femenino.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_off00006b54.bin
89c731c27c6474ff7f33ecfdc3d999a22bded031d32f8d3a7be96b19a894589c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 5036 bytes
font_01_sfnt_off00007c83.bin
9376d630b96a8076644d4ad568ba50d5ed5f1d931df3056f214314ac4628d5a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C83 10264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.