Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaf64f8eb69b774…

MALICIOUS

PDF

38.5 KB Created: 2020-08-30 09:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1b113b2dfeba4a87130a441eda960c9 SHA-1: f8c10f172193e5b77279cebbf06c7271be541caa SHA-256: ebaf64f8eb69b7742eb30bd86357b0d7dbe5fa8cf2cb8e68dd03a1247e28d214
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=male+chastity+a+guide+for+key+holders', which is also flagged as malicious. The presence of a large number of external links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious URL. The ML classifier also strongly indicates maliciousness.

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.ru/wix?keyword=male+chastity+a+guide+for+key+holders
    • https://static.usrfiles.com/ugd/b8c837_91a129d798764c8ab06fea74434c614a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b3ea172b5c2452ca0f08364a1105733.pdf
    • https://static.usrfiles.com/ugd/b6edda_8d0971abec9e43ac8e1eb19470d20b54.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e9895dc3dcf435687dd0be275f704c8.pdf
    • https://cdn.shopify.com/s/files/1/0436/1368/3874/files/abrahaminte_santhathikal_yarusalem_naayaka_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/15434671223.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6172/files/totomumatiwuludi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/63287630052.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/research_concept_note_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/gilipesujoru.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0598/files/bts_wings_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/rusogupeneno.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/57337452186.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/43428062663.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/what_is_com._avast._daemon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/chicken_flute_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/gutewokam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7033/files/watch_free_bootleg_movies_online.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_off00005679.bin
9c7d269fdb5d8c33f9dae4a4d17bfb920741b0e9457fde11462f9b6345b331e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5679 5452 bytes
font_01_sfnt_off00006908.bin
7c50b2bbf87c47b4402952a9356dbf48c671e29d6beb9a5e03064dd95b768750
pdf-font-stream PDF embedded font (sfnt) at offset 0x6908 10504 bytes