Malicious PDF — malware analysis report

Static analysis result for SHA-256 692cedfced91e385…

MALICIOUS

PDF

96.5 KB Created: 2020-09-04 19:12:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01eb57ce20046c4a527f36133cf13b5b SHA-1: f212dcfba4c2ab6e56e15574017c7818cfb30381 SHA-256: 692cedfced91e3853ca1d5403d895038ba85c238255a55181aba570f3caea8fd
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly indicated maliciousness, and the document body contains urgency language. While no scripts were extracted, the presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=esc+guidelines+paroxysmal+af
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/mosidujagonunuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/ioun_stone_of_reserve.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/living_religions_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0441/1051/2280/files/paduxemi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/18700457013.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1239/files/real_book_6th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/manual_del_perfecto_idiota_latinoamericano.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/femaxiwujaxugese.pdf
    • https://cdn.shopify.com/s/files/1/0437/2856/8474/files/65366150901.pdf
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/mawezimazus.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/18809588797.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/partnership_capital_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/26305453421.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62dca9eb4164cc580e4e8856dd25dcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cced09d6a254860bd054564cf2df276.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_off00012e9d.bin
b8dc10e3a0d5aeecd4bea1fa32a18ae48693162362e29fb78262374dfc43cb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9D 5404 bytes
font_01_sfnt_off000140e0.bin
aca38a3297bf9630314f003786196455dc83fa0b85b5ef3ed3986411cc3523a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140E0 11592 bytes
font_02_sfnt_off0001669b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1669B 4324 bytes

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