Malicious PDF — malware analysis report

Static analysis result for SHA-256 690a9b1268e35bda…

MALICIOUS

PDF

40.2 KB Created: 2020-09-04 17:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b60ceac66bab501db42965717479611 SHA-1: 6194be74c767d4012a81011d98cca928523bdf43 SHA-256: 690a9b1268e35bda17588e563fe5a3e5f936a8ceafdcfe5e0cb29fa9e89e5db6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, disguised as a manual. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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.me/pify?keyword=bessacarr+e410+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6091/2537/files/everybody_branden_jacobs_jenkins.pdf
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/gaxugedidopizetezosivonol.pdf
    • https://cdn.shopify.com/s/files/1/0447/3444/7770/files/spiritual_breakthrough_prayers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/51130840138.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6343/files/vowels_and_consonants_in_english_phonetics.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/careless_whisper_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/52868586390.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://static.usrfiles.com/ugd/9ea91e_b6f7200432ef4493a09e4865601317ec.pdf
    • https://static.usrfiles.com/ugd/87fdc7_c7cd32f544c4421c99425cacb146f196.pdf
    • https://static.usrfiles.com/ugd/bf0735_eb44cb56152f4e7aad39b7dd530f2832.pdf
    • https://static.usrfiles.com/ugd/4c3ae3_79d2a18d3cda43f3b877f63d03def7ac.pdf
    • https://static.usrfiles.com/ugd/f46427_253a1f3d8c7841e69fed847b1d88fee2.pdf
    • https://static.usrfiles.com/ugd/f59309_39199abf00124db296a391722a9cfe7b.pdf
    • https://static.usrfiles.com/ugd/135178_d5f790e90b694863bded83df5d40355e.pdf
    • https://static.usrfiles.com/ugd/625844_715e46d298ac4d3fb8bb1abbbedf9750.pdf
    • https://static.usrfiles.com/ugd/e56fe2_dbc75a68dca14f79827473ac935bb1aa.pdf
    • https://static.usrfiles.com/ugd/4b874d_d67a531fc0944e0f9c6c56d75bfce73a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b1.bin
0e54ae7d2736c76c6fe8a05cebb01ef6f77ad1d37988acca6ca0efa8b2455435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B1 4920 bytes
font_01_sfnt_off0000644d.bin
b98f70a79f1c33379e343be29a14513ac4905e43a806df7a6bac3e2de65f1f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 9796 bytes
font_02_sfnt_off000085eb.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EB 4324 bytes

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