Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc483dd2e2ce866…

MALICIOUS

PDF

41.1 KB Created: 2020-08-12 07:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d590748481c0ef0f5cd998749f53a098 SHA-1: a00607871c99b4cc7bab2c6fd211cbe51141c98c SHA-256: 5dc483dd2e2ce8661fec8433ab6ebcd0c7b41e65e8725f662e0931924026cb9e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. This suggests the document is designed to lead users to malicious content, likely through a chain of redirects. The ML classifier also strongly indicated 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.ru/pify?keyword=caccia+al+tesoro+pdf
    • http://files.naturaltherapiesbyelizabeth.com/uploads/1/3/2/7/132712306/37250364c.pdf
    • http://files.readingdoubleglazing.com/uploads/1/3/0/8/130813777/gigofalagugi.pdf
    • http://furugo.vestvisual.com/uploads/1/3/0/7/130776757/472686.pdf
    • http://felipadok.patjackman1.com/uploads/1/3/0/8/130874284/wesinawifavuvaxip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/18604901793.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/rozogirazuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/lujaropigef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/banikexiposenolasarewik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/boundaries_in_dating_how_healthy_choices_grow_healthy_relationships.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/foxepevuraguperinugena.pdf
    • https://cdn.shopify.com/s/files/1/0443/8307/6518/files/32975394863.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/social_entrepreneurship_and_innovation.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/subutosewigowekomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/80658605859.pdf
    • https://cdn.shopify.com/s/files/1/0436/0264/1059/files/6513717368.pdf
    • https://cdn.shopify.com/s/files/1/0429/9220/5978/files/labotazuwolazirojasuwusug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mupesoxozuwimufuvijolus.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/64323249536.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_off000062c4.bin
a4e537f773b5c0ffd349bca475b33482f8bdefa2a46a0c98640629eabd6a03f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 5052 bytes
font_01_sfnt_off000073f9.bin
af24da202713ed5f92309382100e4879b184284c89ee8940b2e0d9b36254f828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F9 10672 bytes

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