Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed9d9153ae58744…

MALICIOUS

PDF

35.3 KB Created: 2020-08-28 01:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e997f3d914c3bba12122d1534dea5628 SHA-1: 6daeaf9a8b305bdb0e1627c072e5bc1076b0feac SHA-256: aed9d9153ae58744877744e2c74e53242d39ac6945a2b75067563772782ee91a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to 'Transcription and translation practi' and includes the malicious URL. The presence of a link farm with numerous PDFs hosted on Shopify, combined with the malicious redirector, suggests a phishing or redirection attempt to a malicious site.

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.com/pify?keyword=transcription+and+translation+practi
    • http://files.rickgrimes1.com/uploads/1/3/1/6/131637589/dukopiduzoti.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4885/files/aterosklerosis_dan_arteriosklerosis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/basic_statistical_tests.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/limirixulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/farewekewatumutadox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8458/6903/files/linux_shell_commands_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5756/files/vpn_browser_for_android_2._3.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/riesgos_laborales_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0463/0183/9522/files/fefiloleginewubaw.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/word-_wrap_css.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004203.bin
8f2d995ebe1f6bad8c5cdc64cd8bc6f397fbf5b1291127ba4490ca5e7417e354
pdf-font-stream PDF embedded font (sfnt) at offset 0x4203 4688 bytes
font_01_sfnt_off000051da.bin
6f8f69934384f18bdf6cc0d6c692116da22fb8c1d06b3b0c47af06da9928e6df
pdf-font-stream PDF embedded font (sfnt) at offset 0x51DA 9600 bytes
font_02_sfnt_off00007293.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x7293 4324 bytes