Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3cca0395c06e5b…

MALICIOUS

PDF

51.7 KB Created: 2020-11-01 02:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a5bc41e643322d920804f796eb4d980 SHA-1: eeefdc1a1766e3f2730ed45b09aed005e26646aa SHA-256: ae3cca0395c06e5b46da68e5ec37348b3162a35d4429f2abcb2458813d5b9c6a
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to gettraff.ru. The document body, though heavily obfuscated, contains the same URL and text related to game downloads, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, including one that leads to known benign content and another to potentially 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://gettraff.ru/123?keyword=mana+khemia+2+psp+english+free+download
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f9805b2b566c.pdf
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6204283.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fasanag/world_geography_book_in_hindi_download.pdf
    • https://uploads.strikinglycdn.com/files/a9503816-2e48-4e14-95b9-0e0c8b826347/34889869792.pdf
    • https://s3.amazonaws.com/debamijizozexo/14806104931.pdf
    • https://s3.amazonaws.com/gupuso/68418551300.pdf
    • https://s3.amazonaws.com/xarojapi/lozakuzigapogukatijagu.pdf
    • https://uploads.strikinglycdn.com/files/095c67be-b897-415e-9240-d8abe0de650d/53626993345.pdf
    • https://uploads.strikinglycdn.com/files/570a2862-8fc1-48c4-9d3c-1e69156f9e2f/dragon_ball_episode_of_bardock.pdf
    • https://s3.amazonaws.com/sodoxi/mass_effect_sovereign_voice.pdf
    • https://s3.amazonaws.com/netinuwa/biggest_loser_exercise_plan.pdf
    • https://s3.amazonaws.com/fejenijovekozu/howard_miller_dual_chime_mantel_clock_instructions.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_off00005ed0.bin
4c7b199c478ced3ff70ce2420cbcd1734bd6ce860906487ee1487dd8573bfe40
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED0 11540 bytes
font_01_sfnt_off0000857d.bin
636a7c0fe82127743cda99070c11d047e5a29c67ecfae14ba567fc40bda449ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x857D 5748 bytes
font_02_sfnt_off0000990a.bin
e30a152672d685ba395f93d6537ab0a3dcc9c5e21cd5380cfff8e313c339c3bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x990A 11288 bytes