Malicious PDF — malware analysis report

Static analysis result for SHA-256 00903299e292db5b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-19 10:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1a3c1b7929da83637d4e59a54ecff4 SHA-1: 6e2db83b8866c02dedee8af36360e21702c5e5a7 SHA-256: 00903299e292db5bc989c90feccb0db54882f59c45e8d31d2ff082a39ca779e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'yellow gold t shirt template' and the wkhtmltopdf application, suggesting a lure. The heuristic firings indicate the PDF is designed to link to external, potentially malicious, content, likely for SEO poisoning or to lead users to phishing sites.

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=yellow+gold+t+shirt+template
    • http://zidegar.popcornpitstop.com/uploads/1/3/2/3/132303382/1786033.pdf
    • http://files.jingyiwangart.com/uploads/1/3/1/4/131411474/tonorix_rekojezu_belojame.pdf
    • http://files.lincolnfencecontractors.com/uploads/1/3/2/6/132681938/7c5f525598fb.pdf
    • http://files.mcshuki.com/uploads/1/3/0/9/130969399/17cf38ea5f48ce4.pdf
    • http://files.lucasregoborges.com/uploads/1/3/2/6/132681080/d7289a4cf003.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/73258996010.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/76758479197.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/28675032343.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/niwufopawizedozojowipub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7140/5222/files/covered_interest_arbitrage.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/mebadavoxir.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/kajigumuxixijutisemorotuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/arduino_sensors.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/absorcion_de_nutrientes_en_monogastricos.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/22669936691.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/bafarovisubuvobepudag.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_off0000678d.bin
4c5b4df293e779f771aad7b862964f3a0ad3024441635ca2064cf871f402c41c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 5428 bytes
font_01_sfnt_off000079f2.bin
bfadcb9f76d00816881a70be7c4493ba7ad78628b1e75240cca7af45a879e7fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F2 10528 bytes

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