Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f89b45cf78b350…

MALICIOUS

PDF

44.4 KB Created: 2020-09-01 11:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 935ab3e360abe727b4b1e4bee8a3a54c SHA-1: adae03a90d7e66aecbfbf2d62434be6d0a514e2f SHA-256: 70f89b45cf78b350690b6aeaabd0237953c441c900d6354f72041d905a2425b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a search query for car pricing. This indicates an attempt to lure the user to a malicious site, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious.

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=kelley+blue+book+used+car+guide+2017
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4203/8172/files/pdf_to_ms_word_converter_free_download_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/volalej.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/pudoponerarijub.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/nubasiletezaxajelo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/29671958023.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ab2000b8d6042e19db345e48f2bcbda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/cisco_switch_2960_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2601/2567/files/95652593934.pdf
    • https://cdn.shopify.com/s/files/1/0432/3465/6423/files/33991681971.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/15025227395.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/ulcera_aftosa_recurrente.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/f46427_3ace3797367b43caa4d3b522c0b32737.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_off000063df.bin
2b31e407c8b0d689a614a8e56ec2789580e312377350f6dcc23cf0844adabea8
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 5788 bytes
font_01_sfnt_off000077b2.bin
21debe4485ad115cfbcd523967fa81096cc958d0c584005f86610fb1e683e750
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 13624 bytes