Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb65c7ffaa5d1fd…

MALICIOUS

PDF

39.3 KB Created: 2020-08-06 18:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d806b99887dc49e748c8689a8db0aa7d SHA-1: e69986b0af4977ed3c2315c4ce45035089358949 SHA-256: ebb65c7ffaa5d1fd473b0029f979bd4c45c11af060fce2f7a5953a11c3b3d0dc
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. This redirector is likely part of a link farm designed to drive traffic to malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains the same redirector URL and several other URLs hosted on Shopify and other domains, suggesting a phishing or scam attempt. No scripts were extracted from this sample.

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.ru/pify?keyword=learn+android+linux+command+line+shell+pdf
    • http://files.turuan.org/uploads/1/3/1/6/131637881/a34d488358.pdf
    • http://files.newreach.com/uploads/1/3/0/8/130813906/2bfa425328f7401.pdf
    • http://files.penguinslax.com/uploads/1/3/0/8/130874324/palakafor_varozo_bapikux_gulanojetarepi.pdf
    • http://kisobonig.sjdesignsllc.com/uploads/1/3/2/6/132681233/8422656f9ea2b9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/tevutinutijukigimixated.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/definition_of_post_harvest_technology.pdf
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/10058973578.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/16218948397.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/aerodynamics_for_engineers_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/9769/4109/files/muxipejokuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/71096209024.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/dajoxipinepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/28793996473.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/notazud.pdf
    • https://cdn.shopify.com/s/files/1/0436/0847/3763/files/abscesso_cutaneo_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/defaniga.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb6.bin
271956d99e1c0ba1fd8d5d33a4a3947aa1a8fadb35de265481d486c867b41f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB6 5404 bytes
font_01_sfnt_off00006dfa.bin
7517c95b9dee8322aad9485a4a5b1acb2e7c4b199037b60b4aef78728a732a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFA 10008 bytes

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