Malicious PDF — malware analysis report

Static analysis result for SHA-256 024290a7d1e5125e…

MALICIOUS

PDF

42.3 KB Created: 2020-09-02 00:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0db3ae1917ae197e857efd9fe0fbf11f SHA-1: 52789737fdf1eb3dd148dcec38a4e09d1ba74467 SHA-256: 024290a7d1e5125ef5e2f365a45c7519b98ca5ed81f7614285e7ef4bf72a2bd1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. It also exhibits a PDF SEO link farm behavior, embedding numerous external links, many of which point to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the embedded links and redirector behavior indicate an attempt to lure users to malicious content.

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/wix?keyword=ap+psychology+chapter+11+intelligence+test+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/xolepomegisixus.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/luxobutagigapa.pdf
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/user_input_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/nujawaviralux.pdf
    • https://cdn.shopify.com/s/files/1/0444/4743/2871/files/versacheck_software_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dekafarisajanitid.pdf
    • https://cdn.shopify.com/s/files/1/0435/1623/1840/files/all_differential_calculus_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/english_alphabet_chart_with_pictures_printable.pdf
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/kisakeregem.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/31998435985.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7613/files/college_physics_serway_vuille_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/pedomegoziduxe.pdf
    • https://cdn.shopify.com/s/files/1/0447/5099/5605/files/contexto_social_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/5538/1669/files/91127008889.pdf
    • https://cdn.shopify.com/s/files/1/0450/9663/2472/files/special_education_lesson_plans_template.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_off00005487.bin
7d47334f5f46e6440b3fe9547de548489faf0604e768c1bf766f4e5a22387f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5487 5216 bytes
font_01_sfnt_off00006652.bin
3c34998a6fbd7e21b192758e0958e308181ac96c6e72322a4d9b9aa703699275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6652 12384 bytes
font_02_sfnt_off00008e0b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0B 4324 bytes

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