Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e82f23678b25b74…

MALICIOUS

PDF

67.1 KB Created: 2020-08-23 23:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60899c63bc37da5522b4728f7a4f7d62 SHA-1: b766963b7ad4594544d298e613650f6b8ab79c24 SHA-256: 6e82f23678b25b7485370374093ac59296f4ef6575c48dad796b2ec87676e902
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, suggesting an attempt to lead users to malicious content. The document body, though heavily obfuscated, contains a URL that appears to be part of this lure. 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=product+development+business+plan+pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • http://files.4thandunion.com/uploads/1/3/0/7/130740318/0729eadc1a99.pdf
    • http://files.pricebrothersauction.com/uploads/1/3/0/7/130776006/tavikuwawa-terejujogomasu-ruwewer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2179/4460/files/rubalamaxumagelat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/76727939111.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/beatsx_wireless_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/5e_cr_table.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/lesiberuwezagiximo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/zafawenuxemod.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/manajemen_sumber_daya_manusia_hasibuan.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/market_segmentation_targeting_and_positioning_of_coca_cola.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_off0000c930.bin
8f4ddabed4b4b51ec599b6443bbd9ef51e86828a563ae75168ef4448b5a8e882
pdf-font-stream PDF embedded font (sfnt) at offset 0xC930 5500 bytes
font_01_sfnt_off0000dbcd.bin
e8e3e4a475d9cb1ddd50db09394fb8009c42b20cd70d0f4cd685c38ddc6adf28
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 10376 bytes