Malicious PDF — malware analysis report

Static analysis result for SHA-256 01574ab82e5d7019…

MALICIOUS

PDF

40.8 KB Created: 2020-09-01 23:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5932f0190c85cb34315507a67f9539dd SHA-1: f1407c4838e7f64ad98a963228772e6b20a4693d SHA-256: 01574ab82e5d701950e161b6c00f7f4204005df37d78692861f55c35c47e94d9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download' button lure further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=capability+statement+template+for+small+business
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/bell_tiles_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/70107107366.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/xepimudupuvulonerafor.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/60880680166.pdf
    • https://cdn.shopify.com/s/files/1/0435/4922/9220/files/mefoxoxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9561/files/andhra_bank_education_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/9712/8102/files/43509477483.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/xodifepewenegifigidoja.pdf
    • https://cdn.shopify.com/s/files/1/0432/4442/1282/files/buried_2010_free.pdf
    • https://static.usrfiles.com/ugd/7ff653_98e31cf7f5504b6d99f1c78703d46332.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab1c81ca3e394f149433789237b1c16c.pdf
    • https://static.usrfiles.com/ugd/b8c837_598d2ef1033543f6ab62f6f62b077c07.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/guxalibituwuxuzil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/31907940146.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/direito_processual_civil_daniel_amorim_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/advanced_excel_2020_course.pdf
    • https://cdn.shopify.com/s/files/1/0447/8061/7885/files/the_turn_of_the_screw_henry_james.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_off00006252.bin
9787905681392090bbf476794b252f10d7c0b284e23e4ed198f2a365c27e7f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 5196 bytes
font_01_sfnt_off000073e5.bin
4185ab012565379a5beb012eb25d331258eb360e2a92bdcd3ce2ceff44b5b8db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E5 10052 bytes

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