Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be415d3e107b76a…

MALICIOUS

PDF

42.5 KB Created: 2020-08-25 01:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af47880e29e3d55b76b0188d6ce10e63 SHA-1: 76255dc710ff94117e9cd428d1273bd9c6cf97fc SHA-256: 0be415d3e107b76a4247f3fc4617a6cd0b54f25c38040a3d1ac0fee96fd11443
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to malicious infrastructure. It also hosts a large number of external PDF links, many of which are benign Shopify links, suggesting a link farm or SEO manipulation tactic. The presence of a password-protected archive lure heuristic suggests the document is intended to trick the user into downloading an encrypted payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=online+music+library+project+report
    • http://files.caringinc.net/uploads/1/3/1/6/131636914/4932222.pdf
    • http://files.floridaballetconservatory.com/uploads/1/3/0/7/130776245/taduvunawawopedonuv.pdf
    • http://nobunabuv.radioquetal.org/uploads/1/3/2/8/132814930/jomagozofiwuj.pdf
    • http://files.urbanthreadla.com/uploads/1/3/1/3/131384113/misigonogufevuje.pdf
    • http://gijozu.cabarrusflyers.com/uploads/1/3/2/7/132740873/mekasegipege-sonuko-vomexisovibefo-penop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/spelling_test_template_25_words.pdf
    • https://cdn.shopify.com/s/files/1/0429/4125/1747/files/get_ielts_band_9_reading.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/21120357581.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/really_hard_math_riddles_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/gabilizizopijidigeko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5650/files/impossible_quiz_answer_level_41.pdf
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/katupunogazozepup.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/27896870078.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/jabutogagibogabid.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_off00006735.bin
ba40421f5804d643c24743e13c896edd92634f36315d88acb720ed551517f3b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 5424 bytes
font_01_sfnt_off00007993.bin
8e2231052dd17ee6bb61d2c22b14191cf071511ca66df5a91c2f25acd2e314c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 10352 bytes

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