Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d568fd0a02aee2e…

MALICIOUS

PDF

45.8 KB Created: 2020-08-28 20:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b848605a565b9e433272e5e508251e37 SHA-1: 509602bc8e544989062ad9af5cc725a58e9d0ef1 SHA-256: 6d568fd0a02aee2e0d42ebb8794726ac161e0715f48fea6c01a82aa8f3661586
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to direct users to malicious infrastructure, likely for phishing or malware delivery.

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/wix?keyword=puck+oven+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5e91c8ffad224240b9b6ae6b2fc36491.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6be4d119454488385e544be8e0be150.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad839648952a4f50aded2fd2e65d4f8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2dc5fa4aef0642abb8432000f11f9378.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc25a47a265146d5aba92136afab4e3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_16a197206b3d42e798e881b61fe74dd9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0456f83b53964426a41325bac41d8f95.pdf
    • https://static.usrfiles.com/ugd/b8c837_de08946a9d27462793c77bec0e9c467d.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/javascript_date_format_iso.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/dimilikiwawafobuwipupuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/office_design_case_study.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f34ff608644465497c549119ec35bbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_1410f3e0148a46feb1339822ff8d32aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b1e24127d5c4175b889c175a960c520.pdf
    • https://static.usrfiles.com/ugd/b8c837_a141e5303cdf4d0892d752e5f9f955af.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_off0000777a.bin
2cae8a7724f39e5ceb3b06e83f55eee3fabab6d4fe2a0c66f56254d2a7b44ad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x777A 4588 bytes
font_01_sfnt_off00008734.bin
85ca9ce0f2453a448b5bb98259b6785b6affcf0cc8ecb59d93f20e7be341fe51
pdf-font-stream PDF embedded font (sfnt) at offset 0x8734 10228 bytes