Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e452887835a33d9…

MALICIOUS

PDF

40.1 KB Created: 2020-08-29 17:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6adad10660d2dbb7fe8ceb6d70a3e0d SHA-1: 293cf4ce05342e1732e56a6812772a0ddce34bd8 SHA-256: 2e452887835a33d93597bfef68932e6fc499e999d61a19ba771a3f5ee908dcac
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.com/wix?keyword=delete+twitter+messages', suggesting a lure related to social media manipulation. The presence of a link farm and the ML classifier's high confidence score further indicate malicious intent, likely for phishing or malware delivery.

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.com/wix?keyword=delete+twitter+messages
    • https://static.usrfiles.com/ugd/b8c837_d7ad1b28489c4ecb8a9d12318e518c9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f0ef534d9c14e938ebf0f527d2bec38.pdf
    • https://static.usrfiles.com/ugd/b8c837_64a5360b754243ffa1bec505528476f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f6588a9727040cd8516f8fa2f99ca17.pdf
    • https://static.usrfiles.com/ugd/b8c837_26cb496c325849aab03ef72f414389b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_497dc99242c144dbba8b873bab2c1a97.pdf
    • https://static.usrfiles.com/ugd/b8c837_051ad0a2673f4287b6d7440a6db212f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c5d557a7ab4480957e24a19e6cb8b7.pdf
    • https://static.usrfiles.com/ugd/77d535_243cbc89dc644659844c9468dcbb6d3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcb736365cfd43b3b88edad5c6de1288.pdf
    • https://static.usrfiles.com/ugd/b8c837_22813a1d775f470e99dea0f87da2c60b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5457bbe5509467abd543692feda57f7.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/reflection_and_refraction_worksheet_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/sakhi_movie_ringtones_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/sepukojirudinewose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.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_off00005f3f.bin
dea88d84c4ae582fb251470ee9b6ae143eb8b1c6001fbb7f72275d73f962a0fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3F 5096 bytes
font_01_sfnt_off0000708f.bin
abed7796421c6079b917d66e2ed508e5e6c31176e2a227fd7de169b51c68be2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x708F 10292 bytes