Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d9d24c09cacd86…

MALICIOUS

PDF

33.0 KB Created: 2020-08-10 11:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a973322421bd5b61958f00b66f211c8c SHA-1: 435bd72f3885d32425af8fd24dec9114c6ef6f99 SHA-256: 18d9d24c09cacd86a25896380257ad2742c75776c0d936fde8745e8a09f01637
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. This suggests the document is designed to lead users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness.

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=modern+big+data+processing+with+hadoop+pdf
    • http://files.houghtonrangersjuniors.co.uk/uploads/1/3/0/7/130775014/zidumaragizuf.pdf
    • http://files.canberraplacentaservices.com/uploads/1/3/1/3/131384401/tufuwanu.pdf
    • http://files.small2big.co.uk/uploads/1/3/0/7/130775520/3184520.pdf
    • http://files.goodeatsbyjeff.com/uploads/1/3/1/3/131383333/sodasixubinawoleroda.pdf
    • http://files.geralddesiralfinearts.com/uploads/1/3/0/7/130775753/goroludosiribanawas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/66509293180.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/rutogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/31423368651.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/noun_verb_adjective_adverb_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/arduino_data_types.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/sufowabawapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0079/9140/files/wizefaxixeriloditel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/acrobat_dc_cannot_edit.pdf
    • https://cdn.shopify.com/s/files/1/0436/2836/3939/files/thumbs_up_in_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/wujesanazo.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_off0000444e.bin
cb525cddca57759681313b0690cbe9aabf6150437aea0056549d4578889e3635
pdf-font-stream PDF embedded font (sfnt) at offset 0x444E 5620 bytes
font_01_sfnt_off00005784.bin
04d64fec5385090629092a8956aab8cf9cd70ec979ed2c51bdc3dc4ca8e1da39
pdf-font-stream PDF embedded font (sfnt) at offset 0x5784 9276 bytes