Malicious PDF — malware analysis report

Static analysis result for SHA-256 11de0de4b7e2a5f8…

MALICIOUS

PDF

44.7 KB Created: 2020-08-30 04:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d4553a226cd3f5eff185e5538ed240a SHA-1: 1ec59d1be27de6ce331f4d112a2e3f552955e269 SHA-256: 11de0de4b7e2a5f8366dff22b56035cf52b711fca658f1e4b65618798af8962f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body presents a fake error message, likely to trick the user into clicking the embedded link. The link leads to 'https://ttraff.ru/wix?keyword=nzos+handshake+error+28862', which is identified as malicious. The PDF also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or obfuscation technique.

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/wix?keyword=nzos+handshake+error+28862
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/account_manager_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7563/files/pan_card_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/password_protect_file_adobe_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0460/3143/7983/files/fogsi_guidelines_for_pph.pdf
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/zivifasu.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f9b168beec40f4aba744411290e806.pdf
    • https://static.usrfiles.com/ugd/d94ae5_021bb477cd7f40d2adbf7207afc3ff26.pdf
    • https://static.usrfiles.com/ugd/4725f1_575f6f4cef024487997cf6026ca2574b.pdf
    • https://static.usrfiles.com/ugd/eaf48f_f52cecda2f2345248694e487d01a884a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b24f09a0afc94eb8a3a36743a3374409.pdf
    • https://cdn.shopify.com/s/files/1/0459/9195/2546/files/cabinet_vision_11.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/tim_whitlock_dm_cleaner.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/setebemalonupiximivabiwa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/89190795737.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/59354666626.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/fapekawubuwugedoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/kayla_itsines_2._0_ebook_free_download.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_off00006753.bin
59ce7b7eba2668e25990a1ecb92c3e842e3464c3eed47af944b49389c46b3f57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6753 5444 bytes
font_01_sfnt_off000079d0.bin
045252921f4d22cd7d431086eb73659393b684d0e2275c085cc9945e09416cf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 14220 bytes

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