Malicious PDF — malware analysis report

Static analysis result for SHA-256 0592269067568bb3…

MALICIOUS

PDF

74.0 KB Created: 2020-08-11 16:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f504a4852df6f3c1d0c6ac9b04b0bea SHA-1: 887eab0452654ff607e00fd5bd638db8111a4629 SHA-256: 0592269067568bb303a4e3198a66a57b19a5af7498925b3bf40940ae2514bf5f
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure via the URL https://ttraff.cc/pify?keyword=paradise+lost+book+5+pdf. Additionally, PDF_SEO_LINK_FARM indicates a large number of external PDF links, with the first being https://cdn.shopify.com/s/files/1/0431/6335/3244/files/deficiencia_de_vitamina_c.pdf. The ML classifier also flagged this PDF with high confidence.

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=paradise+lost+book+5+pdf
    • http://files.thesjrphotography.com/uploads/1/3/0/7/130739398/xizawovoxod_nagomajus_mimuwitu_jujuwo.pdf
    • http://files.resoundyogastudio.com/uploads/1/3/1/4/131408581/zaziverefab.pdf
    • http://zexajen.customersuccessmatters.com/uploads/1/3/1/6/131606346/7844376.pdf
    • http://files.singlemomunderpressure.com/uploads/1/3/0/7/130776601/vetewuzap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/deficiencia_de_vitamina_c.pdf
    • https://cdn.shopify.com/s/files/1/0438/6747/2037/files/benzyl_alcohol_msds.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/bofulitiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/51634915994.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/18490008714.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/29190646378.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/warhammer_40k_tyranids_codex_8th_edition_vk.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/javascript._overlay._slice_0_100._click.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/40879707385.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/robugozid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/complicaciones_del_cateterismo_cardiaco.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_off0000e448.bin
8e531393b1e7a1efe4906b3fb95eaf34758c2e3ff9cfc859f9632260df1f77b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 5364 bytes
font_01_sfnt_off0000f694.bin
880c389672165700879ac7b445aa91c5f5efbda31e053133ea3916547503c2ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10756 bytes

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