Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b33f2c83092e07…

MALICIOUS

PDF

40.3 KB Created: 2020-08-08 12:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed149bb805a1c6bfcff0e49c1f89663f SHA-1: 8c596c2389cf4f18cf889afc45fa50dbbb03b1e8 SHA-256: 10b33f2c83092e07216ff33545832dca812258007e6d836a385ca8db2cee67c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to a link farm designed to redirect users to potentially malicious content. The primary redirector URL, 'https://ttraff.cc/pify?keyword=pdf+bestand+verkleinen+met+acrobat', is flagged as malicious. This indicates a phishing or scam attempt leveraging a large number of external links to obscure the final destination.

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.cc/pify?keyword=pdf+bestand+verkleinen+met+acrobat
    • http://files.adanacfloor.com/uploads/1/3/1/3/131378821/bfa4ea5cc93179.pdf
    • http://datadebel.intucoaching.com/uploads/1/3/1/4/131453574/862fb52db.pdf
    • http://files.dollysgallery.com/uploads/1/3/0/7/130776483/3317125.pdf
    • http://files.stgeorgewaterfront.com/uploads/1/3/0/8/130813330/girozulinep_pukukede.pdf
    • http://felisuxe.naomicaselli.com/uploads/1/3/1/4/131454012/gozuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/9602/0894/files/pezimalolom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9018/files/27638585733.pdf
    • https://cdn.shopify.com/s/files/1/0431/3245/3015/files/dulojadex.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/73631798975.pdf
    • https://cdn.shopify.com/s/files/1/0435/2039/3380/files/history_of_banking_system_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/54398509713.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/jisurikalezinowuzaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1468/files/24767229040.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/dutavelodo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/whirlpool_ultimate_care_ii_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/70643522345.pdf
    • https://cdn.shopify.com/s/files/1/0440/0244/3422/files/auditoria_financiera_caso_practico.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/63630738601.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_off00005fe4.bin
c85fca4bf0b6a992d92d7dd7334ec743730f0c951f5e5fd36c39bf5a16a9dd90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE4 5432 bytes
font_01_sfnt_off00007252.bin
d2967b252a936d8b405e736c3ace2c8fafbf1d3230ecbfa1785ae34c93928c40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 9880 bytes

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