Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae96849ac45b054…

MALICIOUS

PDF

66.6 KB Created: 2020-07-22 14:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49ffef0f388f44975100d22b0f7a506f SHA-1: 0759435644d4ff0bfb3d63f463e36c9da5cdf3eb SHA-256: 0ae96849ac45b0543e225ffbdde0f7ae124abaafbbeb00ff02a3ae5c5a28f79d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (https://ttraff.cc/wb?keyword=patanjali%20yoga%20sutras%20by%20swami%20vivekananda%20pdf), indicating a malicious intent to redirect users to harmful content. The ML classifier also 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/wb?keyword=patanjali%20yoga%20sutras%20by%20swami%20vivekananda%20pdf
    • http://files.kasakesari.com/uploads/1/3/0/7/130739143/8366599.pdf
    • http://files.exodusblog.com/uploads/1/3/1/6/131606256/pijelo.pdf
    • http://files.thepamperedhen.com/uploads/1/3/1/3/131383924/e4ed3bb1d09b.pdf
    • http://files.soapbarlounge.com/uploads/1/3/0/7/130776718/luriza_bokitewakikizu_sepipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2775/9257/files/zumubudubafaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunugituvalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/37888664477.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25696514874.pdf
    • https://tekovisepir.files.wordpress.com/2020/06/80830310762.pdf
    • https://rozirul.files.wordpress.com/2020/06/welowosidak.pdf
    • https://kofetuzep.files.wordpress.com/2020/06/28968783019.pdf
    • https://xifodanupi.files.wordpress.com/2020/06/fogodosololereg.pdf
    • https://navurigafevu.files.wordpress.com/2020/06/99895224272.pdf
    • https://cdn.shopify.com/s/files/1/0428/9029/7507/files/16577756603.pdf
    • https://cdn.shopify.com/s/files/1/0433/0497/6548/files/nefomabigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/11464424818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/wusamewafozijuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/zusezutigilix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/66741822668.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/korekiduxavapesid.pdf
    • https://cdn.shopify.com/s/files/1/0433/5822/4549/files/11812943379.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_off0000c37b.bin
5a45b9a59419043daf5b35948a8001aa90d0aaf3018baf9705a27ccd188a6ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC37B 5780 bytes
font_01_sfnt_off0000d730.bin
05a1a9e0331089b37a5f9df1d5e25dd662941629182cfd27ab0cdb8098e20f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD730 11516 bytes

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