Malicious PDF — malware analysis report

Static analysis result for SHA-256 116abf125dcc3bbd…

MALICIOUS

PDF

52.2 KB Created: 2020-08-30 11:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8750596ca3b798ed2b78f66b7dc8c2ad SHA-1: 683876dfbd4ad74706036d702a08bb616f6ed960 SHA-256: 116abf125dcc3bbd618b19fbace47071ec77b277fd4d0e54755a7c3477bb999d
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a software download, which redirects to a malicious domain. This suggests a phishing or social engineering attempt to lead the user to malicious infrastructure. The PDF also hosts a large number of other PDF links, likely for SEO manipulation or to spread further malicious 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=vyzor+voicelive+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/titedegomogesopafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/ralafapim.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/22656895311.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/banco_estado_apk_mirror.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/tonugixixagewugesasifix.pdf
    • https://cdn.shopify.com/s/files/1/0437/2152/3349/files/47088175143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a738bd1569b4c1b8ac1690591a78efb.pdf
    • https://static.usrfiles.com/ugd/cc03df_b8b34df4d5984cc3a85d84537f4c440f.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_bea981a692274238b166e12e317fd417.pdf
    • https://static.usrfiles.com/ugd/b8c837_66e615173dc842f485a4b6990aa8b426.pdf
    • https://static.usrfiles.com/ugd/a58b01_f8eab6e0bbe74ceda321c49808662051.pdf
    • https://static.usrfiles.com/ugd/63d3ad_da7572fbe41643bfaa03acdf79493ab8.pdf
    • https://static.usrfiles.com/ugd/3f80ec_62d371d868284962aafd3fb0a7086327.pdf
    • https://static.usrfiles.com/ugd/fd7405_090de918095342f78087751d5499728e.pdf
    • https://static.usrfiles.com/ugd/5b9365_4c29076dbbd8401ba7a009a531282608.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_off00008de1.bin
f0ab02b84202f041c9092434b2d9c10542fc3e650020953465e64a749dc2d688
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE1 5024 bytes
font_01_sfnt_off00009f29.bin
bb1c02d8190e4623f73acbc28704f55573b64bde7113a7f15bced52bc4b1c21a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F29 11032 bytes