Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecd923b80f5f12d…

MALICIOUS

PDF

77.9 KB Created: 2020-08-12 11:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10b2320561f0e63ded16a7a123b70227 SHA-1: 6bdbb71ae548ac3b3dcea78372fe3eb2ae500d34 SHA-256: 5ecd923b80f5f12d2dfe4fc31d0d1d8d52a6b12c1f8c579fca2e374115cb285c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier also strongly suggests 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=authenticity+of+the+quran+pdf
    • http://files.richmondavenueanimalhospital.com/uploads/1/3/0/8/130814676/9610654d01775ef.pdf
    • http://files.ed-sen.com/uploads/1/3/1/4/131406082/movoduzajag-mekujuko-gilobip-fowefikawavo.pdf
    • http://puzegox.ahigherhealing.net/uploads/1/3/2/3/132303382/530064.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0294/3909/files/gosixuponekafazar.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/5113314067.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/wixanosevadokawurisumiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/curious_case_of_benjamin_button_script.pdf
    • https://cdn.shopify.com/s/files/1/0438/1288/0541/files/brock_university_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/56169426287.pdf
    • https://cdn.shopify.com/s/files/1/0432/4789/4683/files/palalovimirabesebumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/definicin_de_blog.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/83032546828.pdf
    • https://cdn.shopify.com/s/files/1/0432/2089/3851/files/27751909065.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/how_to_change_a_file_to_word_on_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/2008_volkswagen_jetta_wolfsburg_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/pixuxoka.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6458/files/beginner_s_guide_to_sculpting_characters_in_clay.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_off0000f4a3.bin
128f97959eb08da5947a57816f447448093b24148e5365a9b074cdb764f66ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 5248 bytes
font_01_sfnt_off00010677.bin
850fdbc3ba0d1db5f0f616066ee86830b81828a60c9c25383387211be1903265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 10632 bytes

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