Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecb484da43e878e…

MALICIOUS

PDF

42.3 KB Created: 2020-08-09 02:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6016471c959654a5b948c4e2d4bb7a5 SHA-1: b82d2d51f9935f80da934d13c46c703c51947530 SHA-256: 0ecb484da43e878e33b41f537ea4bd42c260c809bd89987cdd1b3ad93af67d2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a primary URL pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to academic sampling techniques. The presence of a large number of external links, many pointing to Shopify, indicates a link farm designed to obscure the malicious redirector.

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=types+of+probability+and+nonprobability+sampling+techniques+pdf
    • http://files.newlifetabernacleupc.com/uploads/1/3/0/7/130775868/36a25f.pdf
    • http://xefox.mahiora.co.nz/uploads/1/3/0/7/130776445/tofabulumob.pdf
    • http://zitubix.romineshp.com/uploads/1/3/0/7/130738732/ac2b54e800.pdf
    • http://files.trinityumc-bsg.net/uploads/1/3/0/8/130874544/5507231.pdf
    • http://files.fashinfidelity.com/uploads/1/3/2/7/132712209/zejus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/29682071925.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/65942745957.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/arabic_alphabet_tracing.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/pexisopisodakakunirukimal.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/bobejawejebipalujeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/mulafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/31146279138.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/vugeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/4573/9941/files/22763038152.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/39857045248.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/lituberuselonexekana.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/xidovefosilerowuluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0813/files/elder_evils_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/airbag_deployment_system.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_off000067d1.bin
cc0ebc95ed800bcbc241fa266df4f17076306bccc63cf56ac949b93b2831435b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D1 5888 bytes
font_01_sfnt_off00007ba7.bin
756eb2c3257fa2336d3626e23b9cb549c42f50956955ccd1a61512c06530a019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA7 9240 bytes

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