Malicious PDF — malware analysis report

Static analysis result for SHA-256 8080c83418a35e95…

MALICIOUS

PDF

44.5 KB Created: 2020-09-06 00:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03340f9336f20ad0d1c9f74adf79b546 SHA-1: a36add0c5041aa3493a2a241a5396c5de5633abf SHA-256: 8080c83418a35e95c8ee69ac38b92424c85ba0f1c9f356142548aa18700d19ac
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector URL, which is part of a link farm designed to host numerous other PDF files. The document body, though heavily obfuscated, contains text related to a 'smart goal setting worksheet' and the redirector URL itself, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link reinforces this assessment.

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=smart+goal+setting+worksheet+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/5ed537_b85ccaa8a3744fc282cbae0e5c8af35a.pdf
    • https://static.usrfiles.com/ugd/07e02c_ee7a00fd859f4f4f8d96d9a57c3d8afe.pdf
    • https://static.usrfiles.com/ugd/f3bfbb_aae14a460a8a4c94b575927866324eef.pdf
    • https://static.usrfiles.com/ugd/a4c1fa_941c65e06276497982316eb7cd9af39b.pdf
    • https://static.usrfiles.com/ugd/67e251_22828d7e34274e6089528c95a45d22fb.pdf
    • https://static.usrfiles.com/ugd/e4a001_b2a990314223496c8f6f53119add0b52.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/arrancame_la_vida_libro.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9714/files/dunamujivatiwumivotesafif.pdf
    • https://cdn.shopify.com/s/files/1/0452/3936/9885/files/remarque_all_quiet_on_the_western_front.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/storyboard_template_a3.pdf
    • https://static.usrfiles.com/ugd/173616_faa97d7f11394047875de5fa98a73a78.pdf
    • https://static.usrfiles.com/ugd/1acd69_a42eae1035bb46979834d3fdb902bc47.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062aa.bin
7af4baa9f3aed4f900b208c31643f654d35e22837a40dce9dc93ba108e61c7db
pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 5504 bytes
font_01_sfnt_off00007532.bin
1b70862d82f8cd8c2185124db2f2e0428f4e77cd2f34e4272faa9cdada399c0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7532 9956 bytes
font_02_sfnt_off00009745.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9745 4324 bytes