Malicious PDF — malware analysis report

Static analysis result for SHA-256 718db50f7ca47a84…

MALICIOUS

PDF

44.2 KB Created: 2020-09-03 21:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ae9712fb60d3efa9c5718ba531ce5fd SHA-1: 1a16e66736b627a0e3941744825f1a7d0942ab7f SHA-256: 718db50f7ca47a84d969614dc167cd4a27da9ac58fb288a7171135ba2dcdca2d
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a product and the malicious URL, suggesting a lure for phishing or malware distribution. The presence of numerous PDF links further indicates a link farm strategy, likely to obscure the final malicious destination.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=bubba+blue+jersey+bassinet+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4041/5644/files/jegokuxeki.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/99500622579.pdf
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/80278324854.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/83816625719.pdf
    • https://cdn.shopify.com/s/files/1/0462/6703/9898/files/mopejeropodove.pdf
    • https://static.usrfiles.com/ugd/3bcfef_7676b48e054649b491e60b7b57eb07cc.pdf
    • https://static.usrfiles.com/ugd/2d1648_a3f4e84482d14d49ab42ba646c26c176.pdf
    • https://static.usrfiles.com/ugd/1be480_3c3e0421e1db4c079458381bcde05b15.pdf
    • https://static.usrfiles.com/ugd/de60da_0ae6509ab01e468d970ce90c062ffe2d.pdf
    • https://static.usrfiles.com/ugd/ddb60a_125ff8392f20435a835113629d15c31e.pdf
    • https://cdn.shopify.com/s/files/1/0435/2956/8408/files/biwivurozixarogosibi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/tunukeregolem.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005336.bin
ab31f7c61f62ff1c56559b8b48d097519e0946980afe9ac302ef9338f30c020f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5336 5140 bytes
font_01_sfnt_off000064ae.bin
d2cbe7342b44d19fccb845d9c80bb25653c50ecc80eefc4e0196f063e894dae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 10800 bytes
font_02_sfnt_off0000891d.bin
3f8b808a4f5f947aa5ee4c7f599c890230d64338ca129f681505204bffa7b8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891D 17568 bytes

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