Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6430931f49daed…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 20:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05796546e46bb6b653a95b2afe14816d SHA-1: d8a1074f5caad05c955465522cf5636a53b07ea2 SHA-256: 0e6430931f49daed1e1e53d73cc8197d6a3d068d8b430dfa9cec8a073b0e9a6e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The embedded links, including the malicious one, are likely intended to lure users to malicious websites for phishing or malware downloads.

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.cc/wix?keyword=toyota+electric+forklift+service+man
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/dungeons_and_dragons_manual_del_jugador_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/korean_drama_autumn_in_my_heart.pdf
    • https://cdn.shopify.com/s/files/1/0435/5548/7905/files/organizational_behavior_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/birds_eye_steamfresh_fish_nutritional_information.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0bbb218a3344a518b3ca18c344ff1bf.pdf
    • https://static.usrfiles.com/ugd/3f80ec_6fbcf5cdb95b420fbdc37828d131e7e4.pdf
    • https://static.usrfiles.com/ugd/f0e51d_d85b3b9e82184583aa9d014aec552602.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_61db6b49e49b4ab3a6fac6f57b492ff5.pdf
    • https://static.usrfiles.com/ugd/9a242c_51a30fb562164234bf63b29cdc5ec182.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/wazusub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6395/8938/files/ayurvedic_medicine_names_and_uses.pdf
    • https://static.usrfiles.com/ugd/b8c837_a55c0b2b45f34201b223b041f8f25aa0.pdf
    • https://static.usrfiles.com/ugd/9ea91e_f950b9c2f67b4e5caea93b826a027087.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a15653272244229a0a2a02fb1223f26.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000745d.bin
74309d6651ab689cd3e03819d71dc53fcec687fdab3ad2dcb9581ae689ca5267
pdf-font-stream PDF embedded font (sfnt) at offset 0x745D 5204 bytes
font_01_sfnt_off0000860a.bin
1daea825b4d630cabdaac418db1dfef1425887c6d1ee126b39a2b43f74493b04
pdf-font-stream PDF embedded font (sfnt) at offset 0x860A 10352 bytes