Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7993684715a320…

MALICIOUS

PDF

40.7 KB Created: 2020-08-29 23:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0704c0f106759e881e821fc2f9ae648b SHA-1: 9f84ae988b859ff20cf4a31992705f3e87d964c2 SHA-256: 9c7993684715a32048d33e43e85c6a5ef645a557f424fe6eb21f59645bdee58c
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=david+bradley+walk+behind+tractor+ma'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a malicious link within the document.

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/wix?keyword=david+bradley+walk+behind+tractor+ma
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/24438619160.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/gebawuwu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/55565332655.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4485/files/77576409321.pdf
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/26791444976.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/zipul.pdf
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/3512614354.pdf
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/adjusting_entries_in_accounting_examples.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/dragon_age_origins_jammers_stash.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7240/files/xitixope.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/guwesiwegosajewesujagejop.pdf
    • https://cdn.shopify.com/s/files/1/0446/6363/6131/files/fbr_amnesty_scheme_2020_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/30174270808.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9890/files/angielski_od_podstaw_dla_dzieci.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/information_geometry_and_its_applications.pdf
    • https://cdn.shopify.com/s/files/1/0438/5990/2624/files/currency_and_capital_of_different_countries.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_off000060fc.bin
5b11f478cbd0d654de984aad179b307da7d203b8d7486eda4da609b512b8b799
pdf-font-stream PDF embedded font (sfnt) at offset 0x60FC 5460 bytes
font_01_sfnt_off00007373.bin
f7c48b95c946991be3472bcf213686f48295aab05c8af94cd3c5ddbcd9319a20
pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 10064 bytes