Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee247c1e72272b6…

MALICIOUS

PDF

48.0 KB Created: 2020-08-06 04:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed9f6691313297221d731d9f182605f6 SHA-1: 80070cc94793c41ff0440e6feb04265ea68a10e3 SHA-256: 3ee247c1e72272b67e010ffd30f3900b759f46d531287feff0a13ebe423620aa
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body text, though partially corrupted, suggests a lure related to a 'self declaration' form. The presence of numerous external PDF links, many pointing to Shopify domains, indicates a link farm strategy, likely to improve search engine ranking for malicious content or to host further stages of the attack. The ML classifier strongly flagged this PDF as malicious.

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=self+declaration+in+prescribed+format+refer+annexure+e1+hssc+pdf
    • http://files.gcraudio.com/uploads/1/3/1/3/131380687/memijeriro_pegilokododos_purowikipufot.pdf
    • http://jozisug.hsiaoaiwang.com/uploads/1/3/1/4/131407558/vipiwewasakaga.pdf
    • http://befofa.singletonenterprise.com/uploads/1/3/2/7/132710592/8074440.pdf
    • http://files.vickihendricks.com/uploads/1/3/0/7/130738894/gizuwagusuva_sufufojor_vujidaxewatipot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/banned_from_equestria.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/28114133118.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/kufefunoso.pdf
    • https://cdn.shopify.com/s/files/1/0438/6953/6411/files/61079102823.pdf
    • https://cdn.shopify.com/s/files/1/0434/2395/7144/files/tosunexexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/fesikapopexogog.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/bosch_automotive_handbook_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2492/files/minecraft_account_creation_date.pdf
    • https://cdn.shopify.com/s/files/1/0430/9912/7959/files/pulse_polio_programme_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/sasutegunufisotogefoku.pdf
    • https://cdn.shopify.com/s/files/1/0434/3499/9975/files/niriruvuwizasezotab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b4.bin
303cda1bf789d32273629ea6a4f3065e46336d38942e8650c889fc8b9bd84d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B4 5756 bytes
font_01_sfnt_off0000772c.bin
f8541d8902648eb99187d83777eb37867e2348e6b9aa822540287e055665d156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 12916 bytes
font_02_sfnt_off0000a0ad.bin
d7edeb2ed604ff306627e89d7b57ff2ff1f9b255d7a4df22d54c642657e853dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AD 4828 bytes

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