Malicious PDF — malware analysis report

Static analysis result for SHA-256 1942022dd2502982…

MALICIOUS

PDF

46.4 KB Created: 2020-08-14 11:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 642e7801454beda0901b4e65f51f9b56 SHA-1: 1710ec6a61474509375c84ef2de18654b80bc0b3 SHA-256: 1942022dd2502982a595b904df517295dc908552b468cb6d43db4aba52377aff
154 Risk Score

Malware Insights

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

This PDF file contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of many external PDF links further indicates a link farm or SEO manipulation tactic. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

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/wb?keyword=water%20treatment%20membrane%20processes%20pdf
    • http://files.moanalipopo.com/uploads/1/3/2/6/132696323/4a12ec30.pdf
    • http://files.latelierpatisserie.com/uploads/1/3/2/6/132695258/9675465.pdf
    • http://zobuma.katycupcakes.com/uploads/1/3/1/4/131453096/3753811.pdf
    • http://xarul.stjohnsepiscopalchurch.org/uploads/1/3/2/6/132696051/3225948.pdf
    • http://wuduj.gcofc.org.au/uploads/1/3/1/1/131164211/wazinuwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/58615574580.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/building_materials_and_construction_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/vivom.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/estenosis_bilateral_de_la_arteria_renal.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7845/files/39066073841.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/39437229769.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8986/files/grasa_corporal_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1780/files/bevifekonaguwej.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/owl_cengage_login.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/agile_scrum_master_no_gerenciamento_avanado_de_projetos.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/94361353030.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/80698057720.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/imagine_dragons_believer_guitar.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_off0000766b.bin
d2dc367482a7ff89e5c81cbc0c61a42fa98ef10a28615944cc73dabef61c6d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766B 5420 bytes
font_01_sfnt_off000088be.bin
794f188373d18a4ce2aaec80f2be03227d6f3a333e22aafd27eaa12a0fb0597c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BE 10388 bytes

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