Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f66f06fafe1f70…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 12:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc0ada455d3f395ebe6f74c04bb8ede SHA-1: b0b00615fc710b52debc24388f4b953bfbdb916a SHA-256: f6f66f06fafe1f70862ac7b686e94526704cc9e20ace22a624c4e0e009f57752
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to malicious content. The presence of a large number of external PDF links, many hosted on 'cdn.shopify.com', suggests a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. No scripts were extracted, but the embedded URL in the document body confirms the redirection attempt.

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=gaudy+night+pdf+download
    • http://revopum.srinivasan.co.uk/uploads/1/3/1/3/131384424/gubabon.pdf
    • http://vebakam.delightfullyfit.org/uploads/1/3/1/8/131856772/2711c.pdf
    • http://files.mattmediainc.com/uploads/1/3/0/7/130775261/sifepuk_gebul_resepowobagede_kotuginumaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/3385/4103/files/4589568300.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/29079363256.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/payroll_check_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/rarufixod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rafudegilezenetizaxesuvos.pdf
    • https://cdn.shopify.com/s/files/1/0436/4664/8473/files/sujet_brevet_2020_histoire_geo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/bitsat_previous_year_question_papers_with_solutions_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/om_shanti_oshana.pdf
    • https://cdn.shopify.com/s/files/1/0432/6883/3436/files/pdf_to_word_converter_with_ocr_function.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/77342545255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nadogenomaxijedunebenez.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/betazajegovotuzipegefani.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/22146974054.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/deductive_logic_questions_and_answers.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c4.bin
e7c0cd17c87b065c170b1ed2de9e12c3875d73e18ff7aeff32434ee2d601566a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C4 5016 bytes
font_01_sfnt_off000069ef.bin
9c0b721c61c1ab966ce519fbecfac450d2b105505770fa8a84cfd4e0492a62d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69EF 10192 bytes
font_02_sfnt_off00008ca4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA4 4324 bytes

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