Malicious PDF — malware analysis report

Static analysis result for SHA-256 673ee23ca6691b81…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 06:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d102b7f2bda8f309d273f3a495d7233d SHA-1: 7a4d87b246d80b2b923f6a22bf1222571c2a6e2a SHA-256: 673ee23ca6691b81a07519204a858e91a4a74ee51c8ec235a11709cd3b275d08
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one that redirects to known malicious infrastructure at 'ttraff.com'. The document body and embedded links suggest a lure to download content, likely leading to a malicious payload. The ML classifier strongly indicated maliciousness.

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.com/wix?keyword=don%2527t+blame+the+kid+english+subtit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4184/7458/files/accident_report_template_for_preschool.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/synctoy_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/lil_wayne_she_will_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8858/files/bruchungleichungen_aufgaben_mit_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/guzarirufofud.pdf
    • https://static.usrfiles.com/ugd/b8c837_d66773c55c68409da9e384c497cd7da9.pdf
    • https://static.usrfiles.com/ugd/7f46b5_162a716fef8b4066b0cf7fe84b191ed7.pdf
    • https://static.usrfiles.com/ugd/b8c837_52637f0ed32840d0a19be67597a8bf2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc3391f897ee4cf0892fdb4e1ae6a8be.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_6a7c17a4e7b746e9a7f234819778eb97.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_666c3220420144abb6a766e4ec5dfcf8.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005075.bin
0637ce33e0208559fdafbd1d48f8010cfa29b9ab4623225b873cf37f7e821b0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5075 5380 bytes
font_01_sfnt_off000062a0.bin
adb1d23816ecfbe303e570b3f7e623a57b625d4b0dc1982e892c5cd53fd5347b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62A0 10552 bytes
font_02_sfnt_off00008679.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 16092 bytes