Malicious PDF — malware analysis report

Static analysis result for SHA-256 17343c7443ca634b…

MALICIOUS

PDF

44.1 KB Created: 2020-08-28 05:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7414e0943b99bcb9219a8a290edba69 SHA-1: 6ed0cdd23c35e6f031d455559614bce2c7d305e7 SHA-256: 17343c7443ca634b6613f2c1538e666db207937de6b93d3ca70d51f65c81f295
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search results or distribute content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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://ttraff.ru/pify?keyword=jerry+ganz+seatbelt+inventor
    • http://files.flordodharma.com/uploads/1/3/1/4/131437889/9785209.pdf
    • http://nejejetol.shopwithtub.com/uploads/1/3/1/1/131164250/fowavisaxoda.pdf
    • http://jugonu.isaiahinstitute.org/uploads/1/3/2/6/132682035/piseg-miretakedejafol-siloliwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0460/7885/3284/files/myfanwy_euphonium_solo_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/budaya_organisasi_jurnal.pdf
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/87066449101.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/nodedijolugunadorabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/who_blew_up_the_uss_maine.pdf
    • https://cdn.shopify.com/s/files/1/0460/9608/9252/files/antivirus_android_gratis_avast.pdf
    • https://cdn.shopify.com/s/files/1/0431/0712/3357/files/killing_floor_2_weapons_guide.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_off00006e2e.bin
8bfbdaf32eccd0f1114522b65a5153dd28c765e6252ccd4c70c420aeb2bd1b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2E 5192 bytes
font_01_sfnt_off00007ff9.bin
c5336942a1771fd8538f5074f664ec4677a285369f2d251312dd9f907e5977ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF9 10520 bytes