Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6b737e6400b909…

MALICIOUS

PDF

38.3 KB Created: 2020-08-22 13:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e20d0b9dbaf9c6bfc1bd4aea91bf50aa SHA-1: 40280e52289b6b18076ce367319e985937afadef SHA-256: 9f6b737e6400b909b290497b26b06f589602936f2d3096a77878b947418441a3
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a police report request. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the lure text and the malicious URL. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious infrastructure.

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=edmonton+police+report+request
    • http://files.riverreachestates.ca/uploads/1/3/1/8/131856129/vafobevaku.pdf
    • http://fagagogo.picturepenphoto.com/uploads/1/3/1/4/131407552/ferikixiposuxiz-rozokeruf-kexawex-bamunidomo.pdf
    • http://buvanin.dsmtoolworks.com/uploads/1/3/0/7/130738731/5287883.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/miwel.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/51007761000.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0119/files/nys_doh_ems.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/47812800928.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/57894261582.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8913/files/49308169512.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/atlas_of_anatomy_gilroy.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/braverats_rules.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/31780886696.pdf
    • https://cdn.shopify.com/s/files/1/0429/8522/6403/files/middle_back_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7692/files/jonixedonejoz.pdf
    • https://cdn.shopify.com/s/files/1/0462/6645/0074/files/bleacher_report_champions_league_live_stream.pdf
    • https://cdn.shopify.com/s/files/1/0464/5004/9192/files/calendar_2019_template_with_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1821/3797/files/jajeriwatinavunakajimemo.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_off00004b04.bin
8b4bd184767832be792d79744675d30ecd5580f12ee5b5b0848a1f63466ea23f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B04 4972 bytes
font_01_sfnt_off00005bd2.bin
81f2512e2114430ab17449f412549827b39d342346ca2984aff0a3c1d91da297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD2 10032 bytes
font_02_sfnt_off00007e35.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 4324 bytes

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