Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f391ae57f32dd2…

MALICIOUS

PDF

44.9 KB Created: 2020-08-23 07:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43c800131e01fc3ca68b9aa873bed444 SHA-1: 4b0a8893fc8c5954be2023992b401cd27a86a929 SHA-256: 01f391ae57f32dd2bc575a6f8123ca9480b0218ff6f7f5edd64511f2cabbc494
154 Risk Score

Malware Insights

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

This PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting a lure to trick users into clicking it. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation or to obscure 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.com/pify?keyword=benny+hill+show+episode+guide
    • http://files.audridubois.com/uploads/1/3/0/7/130775490/4459621.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/dufopaxajamoroxanuzomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/wodomagebenujudaxiwa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/obc_caste_list_in_telangana.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/kojalanadopup.pdf
    • https://cdn.shopify.com/s/files/1/0462/2109/9162/files/66561590543.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/tenofobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0106/9220/files/ruwowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1611/files/ravaviragifot.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/18222312424.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/final_fantasy_7_cue_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/algorithm_flowchart_symbols.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_off0000737e.bin
89be02e8d51efb2f1c53ae8688681673294f40c685314c0bf392594c8dc1e333
pdf-font-stream PDF embedded font (sfnt) at offset 0x737E 5160 bytes
font_01_sfnt_off00008523.bin
bf11f4334c3743c39222e135b85706d28495944fdc8975d12a4d3b306a25239f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8523 9956 bytes