Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a4c2943c850a666…

MALICIOUS

PDF

60.5 KB Created: 2020-08-28 14:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f139460c8206e844ec1399468df94cfc SHA-1: 3acf7ace1ed4433d6eaf347bf31698c0b1d6b05a SHA-256: 5a4c2943c850a666fc81a611e4f7ad3d08bb6f815fed58adb8a507b69ed3b565
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for popular media. Additionally, a heuristic flagged a 'Clipboard command execution lure', suggesting the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The presence of numerous external PDF links also points to a link farm, often used for SEO manipulation or distributing malicious content.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/pify?keyword=watch+ed+edd+n+eddy+episodes
    • http://files.mirocku.com/uploads/1/3/1/4/131408954/wotalofugonut-kanez-fepox.pdf
    • http://files.stalselem.org/uploads/1/3/0/7/130739122/6636163.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/1/0431/4539/6386/files/julugesipizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/29914369239.pdf
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/28267445889.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/rogusururufunekavek.pdf
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/bible_hub_free_offline.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/sintomas_de_anemia_megaloblastica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bopeberovejaxurid.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/tulojuxesepoxifomuzotajam.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/99185611085.pdf
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/rovekefusalunaneloju.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/vawafigirokinitidobanu.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_off0000aabb.bin
e5720215332a42bde8910dc1ff512c62c80417a96263600409bcd1cab76a83d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAABB 5148 bytes
font_01_sfnt_off0000bc46.bin
68a83175f53fbd89f0354c1b83fd4f1d1ee9e079534d172ba70a60a88d3493cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC46 12732 bytes

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