Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a487031c7456e0…

MALICIOUS

PDF

50.6 KB Created: 2020-08-05 11:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ded4d6d00315c1a73ca699cb5bca41 SHA-1: 967c59b32cc0c3b974c0d5ab645c44972a8297ca SHA-256: 42a487031c7456e099ae0956a11ed7418441f3319498f421b39eb362c3cf28c1
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's primary purpose is to redirect users to harmful sites. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text and what appears to be metadata, but the embedded links are the clearest indicator of malicious intent.

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=surah+ar+rahman+arabic+pdf
    • http://files.larkinpetersart.com/uploads/1/3/0/7/130775707/7dbffedde6.pdf
    • http://files.lancecrane.com/uploads/1/3/1/3/131384489/tupexuwenafiw_tisuku_vexaravoxiki_vitigavineme.pdf
    • http://files.riverheadrecreation.net/uploads/1/3/1/4/131453527/viniz_ninokuxora_wibabufotuno_jarufuviporu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/82805979454.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/dipubipafizuzafovuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/52547732420.pdf
    • https://cdn.shopify.com/s/files/1/0436/5297/2697/files/nikibufuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/kesodigopawogupanikofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/tezufagibed.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/56815404663.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/xojeletudupofixilil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/79332611502.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006448.bin
17b072afd7903f0241f4d3ca3416a7cbaffef4fa91a43159da9e4d407941bf88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 5000 bytes
font_01_sfnt_off00007507.bin
a7655c68697b47f45240fb6b678b4ba644ea8e927ef8006aa7ce7e46869ad779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7507 10304 bytes
font_02_sfnt_off00009840.bin
82e742f5bcc170ad480a0dbac8902174ca8bbd19029d4810b33ede868eba6923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9840 16648 bytes
font_03_sfnt_off0000af60.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF60 4324 bytes

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