Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e14b79923ec07c2…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 04:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abed5f6f70d2b97d2031b57c4523239d SHA-1: 02a666fb9a3cb414a2eba7caf383a0d1ccbacac0 SHA-256: 6e14b79923ec07c238daf41a220fdde03532ee40a1d9e76fe9ba322856beb2b1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same URL and references 'understanding advanced javascript pdf', likely a lure to entice clicks. The presence of numerous other PDF links further indicates a link farm or SEO poisoning tactic, aiming to drive traffic to malicious infrastructure.

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.ru/wix?keyword=understanding+advanced+javascript+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d974b2306f6b4da9a81170ed331ec1c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b90efcf3d364fdf8a2a72e895831b98.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee54e5af58e14636a35fe75f85312b15.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/dokularuk.pdf
    • https://cdn.shopify.com/s/files/1/0449/5409/1675/files/vitedewem.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8a50608357542c586ca6fb062044874.pdf
    • https://static.usrfiles.com/ugd/b8c837_5689eced90bd429ca9020d6800e11d52.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e529965e6e147beb781697430368693.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/6012371751.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9292/files/college_application_resume.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6337/files/lemujemitifepoduxasuxal.pdf
    • https://cdn.shopify.com/s/files/1/0435/7115/1007/files/springing_power_of_attorney_california_form.pdf
    • https://cdn.shopify.com/s/files/1/0465/0313/3342/files/calculus_limits_review.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_off00006581.bin
8f4d99c184555f73708c384f44a84e5c747a72edcdb6f40bec50a6383e772703
pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 5420 bytes
font_01_sfnt_off0000780a.bin
f76a6dfa014840c231f12962eae5ecd52d41a8886ea4c5d53d62804a0c61cc35
pdf-font-stream PDF embedded font (sfnt) at offset 0x780A 12704 bytes