Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a7cdf99eeaaec6…

MALICIOUS

PDF

60.7 KB Created: 2020-08-05 14:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f9a1f781ee60056483f0e75954614c2 SHA-1: 06882f7d37dd4c4c8872d4745954a0f87a027cd4 SHA-256: 02a7cdf99eeaaec6b8cee488bd1a3371ac6d2405b0f3b4b02566b7c78a06562f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external resources, masquerading as a tutorial or guide, which is a common lure for advance-fee scams. One of the embedded URLs, 'https://ttraff.com/pify?keyword=advanced+java+pdf+tutorialspoint', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=advanced+java+pdf+tutorialspoint
    • http://files.christianlisker.com/uploads/1/3/1/1/131164210/guduja_nunatulajolal.pdf
    • http://files.aworldinneed.org/uploads/1/3/2/8/132815172/zezewez.pdf
    • http://files.sineadlucey.com/uploads/1/3/0/7/130740571/4864387.pdf
    • http://files.youthgrace.org/uploads/1/3/1/0/131070572/gidodesizodo_jirujibuwesovan_lugasekoxevekax_wawulogodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/statistical_methods_in_medical_research_book_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/rijubulug.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/toefl_grammar_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/acoustic_wave_equation_derivation.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/online_gift_shop_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/2934690822.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/33710407430.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/vurogaronubizewinox.pdf
    • https://cdn.shopify.com/s/files/1/0430/5957/6986/files/vetuwatixewujes.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/benasebosaxude.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/51452456174.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_off0000ade8.bin
81de27f81a6b9bd529d826b49bcf5517cddab0fd9642eb37c6416fa96a89863c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADE8 5276 bytes
font_01_sfnt_off0000bff7.bin
da096479207c7cae5ea4c4819f91dc8bc922900072027b31b6bec29df2b39739		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFF7 11052 bytes

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