Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da032c4bb01749f…

MALICIOUS

PDF

54.7 KB Created: 2020-09-14 02:39:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ea098d54636097b49169f968e03ad09d SHA-1: 1883d1ebee8a88f1045a6f1ab99e2bc36d5a74f4 SHA-256: 2da032c4bb01749f82e3aa926455865affb54a27e9231ff42528a86942fcc23b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.link' redirector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=anarchy+online+leveling+guide In PDF document text
    • http://futifu.eifel-wohnmobil.de/uploads/1/3/2/6/132683085/3aba06c4.pdfIn PDF document text
    • http://files.dopreno.org/uploads/1/3/1/4/131437276/niralosagu-nogudunetojurab-widerida-nuperolesu.pdfIn PDF document text
    • http://files.dzabahe.com/uploads/1/3/1/1/131163858/luvisupigisufomovaki.pdfIn PDF document text
    • http://files.sayre-computer.com/uploads/1/3/0/7/130775808/c5ea177a2ad.pdfIn PDF document text
    • http://files.scoopsphotography.com/uploads/1/3/0/9/130969887/savadojulep.pdfIn PDF document text
    • http://bibavo.karlahelbert.com/uploads/1/3/0/8/130814407/e4cb83ba4f.pdfIn PDF document text
    • http://mewebes.csroyalty.com/uploads/1/3/2/6/132680835/17a1f94.pdfIn PDF document text
    • http://misen.buhundpuppies.com/uploads/1/3/0/8/130814673/6698232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8157/3279/files/1267112087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6369/7817/files/chapter_12_forces_and_motion_test_b_answers.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/daca0d_7211d275de65419e84131eae2a0f29c6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d7ba0f_c1d897d0f83a4c44b820410af4044224.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a01749_e7fada39da0a4b0a945e533e510c990f.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAE 4976 bytes
SHA-256: 3f3c57065241feeaef710f4b942f6e56dab7c2423f368842c0120325ae9929b7
font_01_sfnt_off00009d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D85 10024 bytes
SHA-256: b49cc0deb17aa204160be0ac5cf3a487837cc2c9527b5556e5c51f92d061a961
font_02_sfnt_off0000bfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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