Malicious PDF — malware analysis report

Static analysis result for SHA-256 289a8ce5a783ad9f…

MALICIOUS

PDF

71.7 KB Created: 2020-08-07 20:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0587be796645ce6dec67a95829f0b79 SHA-1: 412520d304aa41b803b37eb57bd3a9108fd88881 SHA-256: 289a8ce5a783ad9f4fa1861fafa737aa4cb091b1f8b7db67195c433997dc176e
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one identified as a known malicious redirector. The primary malicious URL is https://ttraff.ru/pify?keyword=icarus+paradox+pdf. This suggests the document is designed to lure users to malicious infrastructure. 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.ru/pify?keyword=icarus+paradox+pdf
    • http://files.waco-review.com/uploads/1/3/1/4/131406749/3396424.pdf
    • http://files.jmontanaphotography.com/uploads/1/3/1/8/131857580/rejol-zofejemosor.pdf
    • http://files.missjoyadams.com/uploads/1/3/1/3/131381363/rakajizinoxusixuma.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/mavisomiwawurapawu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/9470835473.pdf
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/raraxokijubamejotilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/22883556679.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4696/files/18733626334.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/degitarakeketi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/50675258257.pdf
    • https://cdn.shopify.com/s/files/1/0440/3272/1046/files/pikilaseto.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_off0000dbf6.bin
de8e8e670cda53148e69b7d49419e78065e561f9804cc037bbb0af4b272b010a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 5124 bytes
font_01_sfnt_off0000ed79.bin
23a37f89161a2e385aa683fcc7c5ab6e29bd6d699cbb3c8130becc2ebc0f4c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 10900 bytes

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