Malicious PDF — malware analysis report

Static analysis result for SHA-256 1695110c26e13bdb…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 05:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69f049617eae3671d477db8ac847ca2a SHA-1: adcd6708733e4d166e06fd9a9f27d5fc4ef957d7 SHA-256: 1695110c26e13bdb06fc2afa7f8b4ebb80dbc7007cbf944b3e081bdb550c4329
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=ibps+banking+awareness+pdf', suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links points to a link farm strategy, likely to improve SEO for malicious content or to distribute further malicious documents.

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=ibps+banking+awareness+pdf
    • http://files.firstcovenantsuperior.org/uploads/1/3/1/4/131454373/ad311744a3460c7.pdf
    • http://files.adelaide-brushfencing.com.au/uploads/1/3/2/7/132740997/midukipupovu-kewawusawojem.pdf
    • http://files.mclactation.com/uploads/1/3/1/4/131452989/bawufefazifi_gifakubim_wizebuva.pdf
    • http://jukug.dolphinhat.com/uploads/1/3/1/1/131164239/nomusoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9682/4221/files/best_answers_for_job_interviews.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/tupivulozizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/callese_y_venda_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/acute_myocardial_infarction_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/nutabib.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/tirutafixo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/tixudozam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/attachment_theory_john_bowlby.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/86612788046.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1063/files/60645528051.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_off00005e2b.bin
a95fd380b25ca99edd0044dedbb1833cc69988970f2b13853f5dc0e201ef4a66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2B 5412 bytes
font_01_sfnt_off000070b2.bin
f867d9c9573c15671eec8672b0762881ddfc156c4499ab4bc046e8391b085657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70B2 12992 bytes

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