Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b56670439b42878…

MALICIOUS

PDF

41.5 KB Created: 2020-08-25 14:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335f01648a0b2a5424c3151b256e3604 SHA-1: 3e3d39b3c7c6e8ebb0d947c8024398478c13f547 SHA-256: 0b56670439b42878d6440518b0161b386063bfdba0a1763810fbe5d24ffdbaaf
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially obfuscated, includes the URL 'https://ttraff.com/pify?keyword=chopping+board+colour+guide' which is flagged as malicious. This suggests the document is designed to trick users into clicking the link, likely leading to a malware download or further malicious activity.

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.com/pify?keyword=chopping+board+colour+guide
    • http://files.davcal.org/uploads/1/3/1/4/131406140/5444924.pdf
    • http://buvexole.hometechrenovations.ca/uploads/1/3/0/8/130874426/vidaposaxip-lobuvor-tasatak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/kenmore_elite_side_by_side_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/magutubesaxupigijoviles.pdf
    • https://cdn.shopify.com/s/files/1/0438/4092/9957/files/web_scraping_php.pdf
    • https://cdn.shopify.com/s/files/1/0434/2723/3954/files/autobus_marbella_malaga_aeropuerto.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/lodawijoluvilalunusaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/4718/9670/files/sekudekusibexewetorux.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/51178920598.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/caries_dental_diagnostico.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/splanchnic_circulation.pdf
    • https://cdn.shopify.com/s/files/1/0437/6343/3621/files/32010399255.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/pemubotixitinivotem.pdf
    • https://cdn.shopify.com/s/files/1/0462/2106/6393/files/miwujof.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_off00006446.bin
30e22e6e5cf5be98b4f1e1a3a04dfd65c8df9fdc5fa8b596ad477624d5e30a58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 5204 bytes
font_01_sfnt_off000075dd.bin
ef5cd237bccad5c4ff57b841ba7de2815f90a6315403fcb63e38f00f835e01f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DD 10556 bytes

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