Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ced9bfee1825ce6…

MALICIOUS

PDF

41.3 KB Created: 2020-08-01 10:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b44336a55af84fc6756f95c12bb00e27 SHA-1: c6a24e61e083d37f2c06b7335834052160d3af1c SHA-256: 0ced9bfee1825ce644d41034c5e4e1e0f21903b50a0d922bf2cfc98f90345966
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a study guide. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=death+of+ivan+ilyich+sparknotes
    • http://files.windyhilldoodles.com/uploads/1/3/1/1/131163734/lekikosunusu.pdf
    • http://files.caldanpartners.com/uploads/1/3/1/4/131406412/golixodikagu-wagawe-fuwawesimupe-mipazuresuvan.pdf
    • http://files.sterlingartsanddesign.com/uploads/1/3/1/3/131381919/2a68e.pdf
    • http://files.4th.mrslambsroom.com/uploads/1/3/0/7/130739298/toloriziwefa_genadu_kebogularon_kepuvum.pdf
    • http://files.legacyiig.com/uploads/1/3/0/7/130776673/jetadorepox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/bitoboguvututubizovisewul.pdf
    • https://cdn.shopify.com/s/files/1/0436/2131/8818/files/45945106866.pdf
    • https://cdn.shopify.com/s/files/1/0435/5712/6295/files/lafumafebisuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/binoluso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3611/4076/files/videlunugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8612/files/fikes.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/rexufexinisuwevumelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37604868145.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/76513429862.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/56297716303.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/the_devil_wears_prada_watch_online.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_off0000656f.bin
94b4eeafde6fd76ce34e6b6982076a560fc98af073dd3e7bc8fb180eea245cd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656F 5328 bytes
font_01_sfnt_off000077a3.bin
b08db27f9d85e8270ac4e991f78bd6d0d44eefd337376c7a1753beb8d892cb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A3 9624 bytes

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