Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c0193c85331bcd…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 17:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52254f201a1a8c2b0c14348de2579752 SHA-1: b512251f9fd3a3c6dd23509c0cd006eb37404d86 SHA-256: 10c0193c85331bcd3f3278a0c9de7c8ab0fd07ca67cfc6f456ab9cf8b649f93c
154 Risk Score

Malware Insights

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

The PDF contains a deceptive lure related to an 'Apple watch ios beta' offer, directing users to a malicious redirector URL. The heuristic firings indicate the PDF is designed to link to a large number of external PDFs, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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=apple+watch+ios+beta
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdf
    • http://sixazu.popmetals.com/uploads/1/3/2/8/132816066/ledibomenabatibugi.pdf
    • http://pomova.kitchenettecuisine.com/uploads/1/3/1/8/131856005/627316.pdf
    • http://mexebag.neidrya.com/uploads/1/3/1/4/131407057/mitunile-zemij-sutuwagivib-kotenejolufaget.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/dofewupiwegob.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/introduction_to_statistical_relational_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/11197577921.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4971/files/51645996008.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/16603750050.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/el_catecismo_revolucionario.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/puvudelebafidosakisifom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/2997/files/gunudules.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/94596278093.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/21307493478.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5509/files/zuginerovizijadupuvutixip.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9564/files/pawujanotizazowinaviw.pdf
    • https://cdn.shopify.com/s/files/1/0445/3462/8516/files/genpact_technical_support_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0457/3672/2588/files/lords_mobile_hero_stages_challenge_guide.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_off0000677a.bin
deae3778896b1b948cb2c411d568fd4016a4e831a6dc71b3eee3a4b5792cbe8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677A 5148 bytes
font_01_sfnt_off000078fe.bin
6f4da6a9a24342f342d3c6724f1189e4eb832da151ee56c2843925fec84d7418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FE 13292 bytes

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