Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e26913657c04d28…

MALICIOUS

PDF

49.3 KB Created: 2020-08-14 09:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58ccb8fcd58641741254c28e67d71551 SHA-1: 11baeb537eca49f84aeaae05cee961aa4d97ffde SHA-256: 0e26913657c04d28687db781f149f937e235331d3a96145286c1503f6df7a644
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL. The document body text, though heavily obfuscated, contains the same URL as the primary malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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/wb?keyword=rrb%20group%20d%20previous%20papers%20pdf%20download%20in%20telugu
    • http://files.teachinghooks.com/uploads/1/3/1/3/131383383/6563699.pdf
    • http://files.theamericansixties.com/uploads/1/3/0/7/130738565/9a4eb453c5b.pdf
    • http://files.premieraestheticshouston.com/uploads/1/3/1/1/131164275/depusudewub_tuvilida_nudeb_pevepowapi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/68491208907.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/backdoor_roth_ira_vanguard.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/33199464704.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/57188971592.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/the_allman_brothers_band_mountain_jam.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9099/files/bartending_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/33298064453.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7345/files/modepanuleber.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/lake_la_aqua_na.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1759/files/vmware_workstation_license.pdf
    • https://cdn.shopify.com/s/files/1/0435/2504/6431/files/kubota_l3400_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/1288/8488/files/kakuvulitijuma.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063e1.bin
65aaf42510f89f1a75a0db6b40a28e4cf384b71dd3e779be80ef4e768428f4ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 5508 bytes
font_01_sfnt_off000076bc.bin
42ee71f4a135bef4e2dfde1dfcb4780bbe0ec7c7c2bc47e3083abd299ce22641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BC 5004 bytes
font_02_sfnt_off000088a2.bin
dc1ec669737906a04a3d12ffb9fbd34ea16f41c9deb8a4388b8219d0c9efe707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88A2 2664 bytes
font_03_sfnt_off000093ee.bin
f3cc1aa5c63cf9fbd72369717caacaea725793bd794e5e70ce010908ef9dcffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 10376 bytes

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