Malicious PDF — malware analysis report

Static analysis result for SHA-256 106da26d923be085…

MALICIOUS

PDF

50.6 KB Created: 2020-08-11 23:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46c73f3db9af2993e09dfb5c98b4e736 SHA-1: 8bb4bd6295a77661083cf06b0088f9709cab63f6 SHA-256: 106da26d923be0855c59ebc049b4b8f0ae8e90d5d74fff7fa83dc746663aa685
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Wipro technical support interview questions' and includes a link to a known malicious redirector. Heuristics indicate this is an advance-fee scam, likely using the link to lead victims to a phishing or malware site. The document body itself is heavily obfuscated and contains numerous embedded URLs, many pointing to Shopify, suggesting a link farm for SEO poisoning or distributing malicious content.

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=wipro+technical+support+interview+questions+and+answers+for+freshers+pdf
    • http://surozibu.hookedontravelagency.com/uploads/1/3/0/8/130814535/677669.pdf
    • http://files.tribalsoundhealing.com/uploads/1/3/0/7/130776445/radekesukujabat.pdf
    • http://files.tricitiespremiumphotography.com/uploads/1/3/0/8/130874474/3312a0cea3d9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/dodiboruxepufulaxuzisi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/ratiwajepuxumidadem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/the_ways_we_lie.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/3267970441.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8411/files/69195623992.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0434/1691/2023/files/papujivipujojusabuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/74764806902.pdf
    • https://cdn.shopify.com/s/files/1/0450/0992/8342/files/herbivore_carnivore_omnivore_worksheet_2nd_grade.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_off000084d4.bin
4ef1a717816c96f941a692a8cb60aedafc3e0b01c50d4e9aad833ffdf9b98cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D4 5536 bytes
font_01_sfnt_off000097b3.bin
898f398268dbcd09eb28f57ddafa24f180fdf5a679f09b7db39161c070485693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B3 10940 bytes

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