Malicious PDF — malware analysis report

Static analysis result for SHA-256 70da70a069808a46…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 02:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57d30dcd8978287ad26eebb031b68b2c SHA-1: 3910081e468a3292f9ba70a8d4cceb6067d41045 SHA-256: 70da70a069808a46099e06b6fb635e959bbe32ed2df956d1b6f932e859971f9c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL and other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The primary goal appears to be directing users to the malicious redirector.

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.link/wix?keyword=reacciones+quimicas+de+sustitucion+simple
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/dadumorepidevosokunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5199/0691/files/bdo_ornella_amity_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/tokeseboguva.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/get_font_from.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/48161387437.pdf
    • https://static.usrfiles.com/ugd/b8c837_63922fa31b41428287cf2be7e624960d.pdf
    • https://static.usrfiles.com/ugd/87d215_be9edc38d23649d2a5a1396da556bb29.pdf
    • https://static.usrfiles.com/ugd/09c3c7_ae547fe69d10477abec2a66d9f8f4931.pdf
    • https://static.usrfiles.com/ugd/b8c837_779b68eb25c74137b70b912d9a4bf8a8.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_769a54bea8d043cda6df1beec0d7451a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e09e6bdd62d4495cab30ac10ada34445.pdf
    • https://static.usrfiles.com/ugd/eaf48f_190acbb82eac498386465b418d22fd8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b3463456e4549edbdb81a62087af4a4.pdf
    • https://static.usrfiles.com/ugd/b6edda_000c38c675eb46b89620329a7290933d.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_off00005dfa.bin
e308ce1fb56a01680abac9a10c34a828d074940e328d95a9c9a74b4570725838
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 5256 bytes
font_01_sfnt_off00006fc5.bin
71d9e8fe5149c70efe0f49b6d53b1cffcceb7983eb45e140ef10c91fc445875f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC5 10984 bytes