Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a528a803e3ffd88…

MALICIOUS

PDF

56.2 KB Created: 2020-09-11 07:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5114c6a9d50c6f7c896c24bbfc903bdc SHA-1: 131182851be6f7d9d1aee120c93373e7147f33d7 SHA-256: 0a528a803e3ffd88399ed7b7b67b240b90cfb1435876d173da6d252ff0d2491e
154 Risk Score

Malware Insights

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

This PDF file contains embedded links, one of which, https://ttraff.club/wix?keyword=formation+avec+les+animaux+en+alternance, is identified as a malicious redirector. The document also exhibits characteristics of a PDF SEO link farm, with numerous links pointing to external PDF files, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary attack pattern involves redirecting users to potentially harmful content.

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.club/wix?keyword=formation+avec+les+animaux+en+alternance
    • http://fodeti.nigelgorskiconsulting.co.uk/uploads/1/3/0/7/130775565/7805eb6002.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.ruthiejenkins.com/uploads/1/3/0/8/130813975/nikufizakiruji.pdf
    • http://nizelaxem.garden-artworks.com/uploads/1/3/0/8/130874368/92b233b296e519.pdf
    • http://bopof.naiacambodia.com/uploads/1/3/2/7/132740470/83d1d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/9730/6776/files/kisanuzatikijet.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/lewutej.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/backstab_hd_apk_data_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9522/8565/files/pipebopi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/bodisimuwidetej.pdf
    • https://static.usrfiles.com/ugd/1acd69_c1c44be004334e40a2cbb6d029a75040.pdf
    • https://static.usrfiles.com/ugd/f9d4cd_75a8afbcb439468a9dd4724f0a6d6052.pdf
    • https://static.usrfiles.com/ugd/9734e7_15cabdfb57e3467bb46ac02b977fab49.pdf
    • https://static.usrfiles.com/ugd/c3f59f_cc947746a0b945bdbdc1117a4b325a6e.pdf
    • https://cdn.shopify.com/s/files/1/0432/9845/5705/files/75887580014.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/74168596330.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f82.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 6744 bytes
font_01_sfnt_off00009067.bin
187c4d150c42a5addb500ddd5cc3ba8e5ad48a5843d0beb35f8fe1cbc186f370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9067 5028 bytes
font_02_sfnt_off0000a16a.bin
7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA16A 2268 bytes
font_03_sfnt_off0000ab7a.bin
ff0882df7f7366dac050a6bd2de3bcd192bea0fd291d2d7cd68ee266da8ae8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7A 12080 bytes

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