Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f0ca5c6d0accbc…

MALICIOUS

PDF

52.2 KB Created: 2020-08-23 23:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78fc7d58cd99b584d4887197ecf40295 SHA-1: e1f68b98c032ca36a7b961d9dbfd0114906099ec SHA-256: 78f0ca5c6d0accbc743f1849015f153a14c1d83c9bea4473a0c42d94053e2614
154 Risk Score

Malware Insights

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

This PDF file contains embedded links that point to a known malicious redirector, indicating an attempt to lure users to harmful content. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of malicious links suggests a phishing or redirection attack, likely delivered as a spearphishing attachment.

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=asuran+movie+bgm+tone
    • http://files.containerofdreams.org/uploads/1/3/0/7/130738806/nasenapiwapoxed.pdf
    • http://files.morningsidechildrenscentre.com/uploads/1/3/1/6/131607522/5034740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0436/1188/1634/files/impact_of_celebrity_endorsement_on_consumer_buying_behaviour_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/ap_calculus_derivatives_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/weight_training_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/nokoguwemog.pdf
    • https://cdn.shopify.com/s/files/1/0459/7435/6135/files/39420105253.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/associer_plusieurs_fichiers_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/firorake.pdf
    • https://cdn.shopify.com/s/files/1/0440/4055/2598/files/lanelabuxevewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/business_plan_sample_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005874.bin
b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5874 6744 bytes
font_01_sfnt_off00006959.bin
ce4a6e2406ae948b607185e510329857af87ab0b034999e596f47b0be67aec63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6959 5160 bytes
font_02_sfnt_off00007acf.bin
40259808b449d493f9f4cc6040d5fe0025f6db724965c9f0626945750436e1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACF 13060 bytes
font_03_sfnt_off00009b22.bin
b78c76f480cb5d7bee7a23852c0b7ebdfe7b1e073d187133a930f032795fe467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B22 12784 bytes

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