Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd04b8e045c55338…

MALICIOUS

PDF

49.2 KB Created: 2020-07-14 07:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d984ddf9fb50a8bd8eacaedf91b6830 SHA-1: c1a0ee6bedcb675ef640629f9a305ad86d09e062 SHA-256: fd04b8e045c55338f2b9175be533f4a7cadbe4a1eec5d9c3f18a9b29c02a00e3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=periodic+table+pdf+color+2020'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including 'https://vumunavu.files.wordpress.com/2020/06/logijuzis.pdf'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes terms related to a periodic table, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=periodic+table+pdf+color+2020
    • http://files.patuxentpetfood.com/uploads/1/3/1/4/131406827/1436276.pdf
    • http://files.heavydutymarketing.com/uploads/1/3/0/9/130969689/1cdc8d7dc54fab.pdf
    • http://files.dependabullbulldogs.com/uploads/1/3/0/7/130775221/7c983.pdf
    • http://files.chalkskin.com/uploads/1/3/1/1/131164313/360638.pdf
    • http://files.chalkskin.com/u
    • https://vumunavu.files.wordpress.com/2020/06/logijuzis.pdf
    • https://duxijepur.files.wordpress.com/2020/06/xizovuduga.pdf
    • https://rawatufigusu.files.wordpress.com/2020/07/52365516369.pdf
    • https://sirozujulad.files.wordpress.com/2020/06/75014546625.pdf
    • https://vofufogufi.files.wordpress.com/2020/06/76235153607.pdf
    • https://latixafu.files.wordpress.com/2020/07/jafolusoripamusama.pdf
    • https://vefadof.files.wordpress.com/2020/07/68837372559.pdf
    • https://pegolupoduw.files.wordpress.com/2020/07/bulerufinabazuxegekeloj.pdf
    • https://nonegek.files.wordpress.com/2020/06/10974576833.pdf
    • https://dakorujek.files.wordpress.com/2020/07/bekonimumamarugese.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/midagesaxowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/zoxopuzusekegoxusebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/11582386804.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/menima.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/26532529821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97897646990.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/debapeliviloputiva.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083bc.bin
1c8843fcb16caeccfd4e32ff6efba36e18f4c9e16a9a69e9d31f0ddc643c81bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 5068 bytes
font_01_sfnt_off000094fc.bin
1be65cca721dfad4fd64fa62d9ee88f76f99848d9df79d0d89d4d0902474a23b
pdf-font-stream PDF embedded font (sfnt) at offset 0x94FC 9944 bytes