Malicious PDF — malware analysis report

Static analysis result for SHA-256 b458475a53f9799d…

MALICIOUS

PDF

40.2 KB Created: 2020-08-12 21:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a2ca3efce9687199530daff61ef7ff7 SHA-1: e4e4e8cfb8c2c3741d5c22243fe84be770e7824d SHA-256: b458475a53f9799d8c3ab93ceaf0020ec8539c1cca2cb516c20eb3fd6fe1828a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the text 'Hierbas aromaticas y especias para cocinar pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a malicious intent to redirect the user to a harmful resource.

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/wb?keyword=hierbas%20aromaticas%20y%20especias%20para%20cocinar%20pdf
    • http://lamoxamo.ccachristiandirectory.com/uploads/1/3/1/4/131437462/72f70fd.pdf
    • http://files.maryamandastewart.com/uploads/1/3/1/6/131637484/6578004.pdf
    • http://files.adornments.ca/uploads/1/3/1/3/131381679/b61acabc815.pdf
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/53038662971.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/47510297498.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/rebamodez.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/zalula.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/topitimakuxire.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/livro_boca_do_inferno_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8772/files/fedexadonigatetizez.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/agriculture_durable_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/85909699807.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdc.bin
2da17eac80f3bd16d48e3403d943c17c0d95643bfd12d441356d9fffa5483af7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5472 bytes
font_01_sfnt_off00006f56.bin
73cf3d47369b3f4c665d4adf5b5b738386cff40621268ac52715d3f1c31d8446
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F56 10832 bytes