Malicious PDF — malware analysis report

Static analysis result for SHA-256 e078af2d8002f0e3…

MALICIOUS

PDF

73.8 KB Created: 2020-08-30 14:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341d8dd0393ab2fd72555dae80b531c5 SHA-1: 7c2503f6806f1e64b87693c9d1c1a38b87718d1d SHA-256: e078af2d8002f0e3f158d084ccb5fcc3c4fa7833af67b3bbf73d7b9f7b7cd372
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to 'static.usrfiles.com'. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/wix?keyword=ladda+ner+sims+2+double+deluxe+grati
    • https://static.usrfiles.com/ugd/b8c837_0ecead672ada402a9e1b088dc14511e0.pdf
    • https://static.usrfiles.com/ugd/0a0016_b1abc32d760846a59cf8d2e8803b59e3.pdf
    • https://static.usrfiles.com/ugd/3f0e57_23ef613fa615422ba800ab214ead5dbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d5c156f420f4fbab58e508c15a4dbc7.pdf
    • https://cdn.shopify.com/s/files/1/0438/2654/4797/files/basic_learning_computer_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/manual_completo_de_tantra.pdf
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/riwabe.pdf
    • https://static.usrfiles.com/ugd/b8c837_63922fa31b41428287cf2be7e624960d.pdf
    • https://static.usrfiles.com/ugd/aef5b7_1293f6527b664baab0f153f273b3f922.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_c06e3aa9c68b4e26b30a9a9ae6a3da59.pdf
    • https://static.usrfiles.com/ugd/0a0016_99316e48c5de412aa34267e61bae4d1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa4e1d730bb54bb183730743fb3ae968.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bde45607d7d45798d5c14c2ef08990e.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_off0000e3f0.bin
f60d2edb8b97ee065a6c5f99f1bdaa089d5c776db155eecbf3bb19329b6c28bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 5428 bytes
font_01_sfnt_off0000f650.bin
c720a24fc0b4e6099907214a5d24287043d0ca995cce626aa6e393c740cb5acf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 10532 bytes