Malicious PDF — malware analysis report

Static analysis result for SHA-256 76bf9205dd2f2c1d…

MALICIOUS

PDF

42.9 KB Created: 2020-08-10 01:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a41fbc34a5ea6c1b0b2a1491a9a20886 SHA-1: 544d6bff2a6c6411d5b4ea723e68aa6f82200616 SHA-256: 76bf9205dd2f2c1dab43623af3d7a9ae790d23b3ca69766d29800047a911c1f3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document body and embedded URLs suggest a link farm or SEO manipulation tactic to distribute malicious PDFs. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=jungian+archetypes+test+pdf
    • http://files.waialuabulldogs.com/uploads/1/3/1/6/131636726/bevopolulavilidigam.pdf
    • http://files.thebluebbla.com/uploads/1/3/0/7/130739132/nifobezolufi.pdf
    • http://files.creativehecovid.org/uploads/1/3/2/6/132695692/decc58dd.pdf
    • http://files.philipmartinsummers.com/uploads/1/3/1/1/131164520/3134896.pdf
    • http://narur.ultimatedraft.com/uploads/1/3/0/7/130738970/985949.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6803/8049/files/vozulalitonezupakibi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/divinity_2_jar_of_mind_maggots.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/creatinine_clearance_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/6046/0701/files/how_to_reverse_a_linked_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/7350/2361/files/potamonakupofiriladopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/kesaduwanixasitexezuwure.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/pemiboxenorazadeka.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8871/files/jipirovubid.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/xupoxumo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/xazojazoleroxililikag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b41.bin
2db4a27e7462ab9bbcc0b9a9cb5b936678ce138de2bae832612fad32b24c75ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 5248 bytes
font_01_sfnt_off00006d11.bin
9aadca3407ef6e741426e2cea3b914b073ad7ccb4ac89b2335cce2d4c1ab52b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D11 10660 bytes
font_02_sfnt_off00009102.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9102 4324 bytes

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