Malicious PDF — malware analysis report

Static analysis result for SHA-256 150dd49a5d111d2e…

MALICIOUS

PDF

49.7 KB Created: 2020-07-31 02:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b8c1366b2ff650ebf9c27b862c55a34 SHA-1: 549f4735025b5a8532bf80cef53b2096a48d7158 SHA-256: 150dd49a5d111d2e38854d9a11110a4279a845a30b94f052ea104e34ed4b2cef
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. The document body, though heavily obfuscated, contains text related to invoices and payments, aligning with a lure tactic. The embedded URL points to a known malicious redirector, likely serving as a first stage to deliver a payload.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.ru/pify?keyword=retinopatia+diabetica+pdf+2020
    • http://files.countyclassdestroyersassociation.org/uploads/1/3/2/7/132712661/cb0e0be9.pdf
    • http://files.hbint.org/uploads/1/3/1/4/131406717/9639792.pdf
    • http://files.neverwantednothingmore.com/uploads/1/3/2/7/132741535/b50d01ba2e5ccfc.pdf
    • http://files.mrwillpe.com/uploads/1/3/1/4/131483361/kadosiwowuvixe_wutenizinojupa_fatesupijiji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/wakuku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/31033577164.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/patas.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/89199487486.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/76838977042.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/zavuwatevuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/50323959344.pdf
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/60929542741.pdf
    • https://cdn.shopify.com/s/files/1/0434/0187/1512/files/56356959350.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/puvozipunuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4329/8207/files/bujema.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_off00006f83.bin
8a42016eb8e35adc9bf42616baad770d21f269fb370b7e531473bf31d7cb5df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F83 5052 bytes
font_01_sfnt_off000080bd.bin
c93b83a98bd6089738ef78ae1b2b725d8a43c5f884872fb2ddeb9dbecf8c28a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BD 10444 bytes
font_02_sfnt_off0000a465.bin
c8e3b24c8ce9ed504125d6e420099360352dce4a210a2ea2f38641ed3aaafa23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA465 16080 bytes

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