Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f188518596f174d…

MALICIOUS

PDF

42.0 KB Created: 2020-08-24 04:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdb389ed5b5061c77e66907cf572ce39 SHA-1: 109cc00075dc27cf7cf4287a7a9a30c45cec8460 SHA-256: 6f188518596f174db443dfaf05dcef87fdad345e196a9cbb6a52371838f56b68
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating an attempt to lead the user to malicious infrastructure. The document body, though obfuscated, contains text related to 'dynamics 365 licensing guide business central' and the malicious URL, suggesting a lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=dynamics+365+licensing+guide+business+central
    • http://files.planninginblackandwhite.com/uploads/1/3/2/7/132710655/bobuzugipiz_renele_litazafurusagop.pdf
    • http://files.52badstoriesandmore.com/uploads/1/3/1/3/131398374/pamiwawig.pdf
    • http://files.blaine-bacchiocchi.com/uploads/1/3/1/0/131070476/1f3613e.pdf
    • http://files.shearluxesalon.com/uploads/1/3/0/9/130969389/vexozumuzuginodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/eutech_ph_meter_calibration.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/canon_rebel_t3i_manual_settings.pdf
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/hummer_h2_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/26033854219.pdf
    • https://cdn.shopify.com/s/files/1/0463/7566/5825/files/piwofidodobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4314/3330/files/vutovomobakisuruboj.pdf
    • https://cdn.shopify.com/s/files/1/0439/2330/8712/files/digital_storage_oscilloscope_block_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1665/files/rapof.pdf
    • https://cdn.shopify.com/s/files/1/0430/1144/0803/files/platformio_ide_installation_suspended.pdf
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/aerodynamics_of_road_vehicles_hucho_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/41370172004.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_off00006398.bin
11e70f1804c13cb4de4b93689bd2c87ad34baf8cdb3f9c0b53449295f7570915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6398 5940 bytes
font_01_sfnt_off000077a7.bin
b0bad2f2388efe5a499d83d916ef5bd167be22b718abf05d7f61f04e17189c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 10412 bytes

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