Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6c4c48a70b58a7…

MALICIOUS

PDF

49.7 KB Created: 2020-08-30 15:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d855721c762be1d1b94613f6e6f0e2 SHA-1: 78e211424c4e1d33503e0bd734da2cb044f37694 SHA-256: 6d6c4c48a70b58a741e1ff62b8b5b0b3e569382f9dde9113df25b6983bf6722b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL and appears to be a lure for an 'entrepreneurship booklet'. The presence of numerous embedded links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.cc/wix?keyword=apostila+de+empreendedorismo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/38381308516.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/43482750113.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/50633268625.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20745245188.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/vexusajolovawabetuligot.pdf
    • https://static.usrfiles.com/ugd/05900a_76714404e0db4e54aaed4f969a58ca9a.pdf
    • https://static.usrfiles.com/ugd/74a852_8e892f1535264a0fb67e15cf1848c474.pdf
    • https://static.usrfiles.com/ugd/19103d_46dbbea5b2e547038f9f733c5555b168.pdf
    • https://static.usrfiles.com/ugd/8a419d_9545b057f8cc4061b4d5d43141b3da44.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/rakogowas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soparuvuridove.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/automatic_pumpkin_farm.pdf
    • https://cdn.shopify.com/s/files/1/0434/5557/8273/files/balesibad.pdf
    • https://static.usrfiles.com/ugd/b8c837_60aaee2e208e4dbaaa5c02bb66bc77a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_bd5bf09cf7934ee49959879a9ad8e9c8.pdf
    • https://static.usrfiles.com/ugd/625844_7a81f020205a4ddaaf97061977911e42.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007679.bin
338a46dfa91d52c8f61b4e0420d879948a9b86611ec4d8bca20d3d5bc6ca3051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 3836 bytes
font_01_sfnt_off0000841a.bin
8c393850a537b943bfee63c48969f5122b1d273227ef0dfff27185a7a7dec48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841A 5092 bytes
font_02_sfnt_off00009549.bin
936e45614013e06a1a0d77be6bd4626019ef238e863b013e363ff8bf495e5a3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9549 10684 bytes

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