Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e5c0b3657bba34…

MALICIOUS

PDF

44.1 KB Created: 2020-08-01 11:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d73612ce57c039cb65bb3c662e6b2e0 SHA-1: afccbdc449faebd84661e280828df4713ab21c76 SHA-256: 75e5c0b3657bba34a856e777d97fad2c5d46f5a6c0c8ed2a9d80eccb523a5fe3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a deceptive link that redirects to malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also functions as a link farm, hosting numerous other PDFs, suggesting a spam or SEO abuse campaign. The document body text, though obfuscated, contains the phrase 'Www. directv/ refresh' and a URL that aligns with the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=www.+directv%252F+refresh
    • http://files.olddouneroadnursery.com/uploads/1/3/0/8/130813846/9053993.pdf
    • http://files.fernandoandradeart.com/uploads/1/3/1/0/131070866/fdaf47796a3e.pdf
    • http://files.kicministries.org/uploads/1/3/1/4/131407668/lewozo_wodamepojov_datirasukuziv.pdf
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5335/1066/files/jodibarumalexapogukej.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1116/1768/files/vafojusepojokerifubon.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/dixigazamusowas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/63936949228.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/getujajegejokiwajolojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/78875464754.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6789/files/rimeminemaxuwinoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/pufisiraxibupowakabu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/mugunana.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/bewuwojexano.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/kujeborojunokobirax.pdf
    • https://cdn.shopify.com/s/files/1/0437/9007/4016/files/xobazovobil.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_off00006eca.bin
c7534e37d832b78fd98117e562f38ffc079d8bd43c5684f7225d11da64a4cd31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECA 5100 bytes
font_01_sfnt_off0000804d.bin
da2febd7fa289567a1f031ec9bdf1d135e7257c5052914eecc5bb2a3ceecce8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804D 10392 bytes

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