Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc479c6415389dd…

MALICIOUS

PDF

48.2 KB Created: 2020-07-28 16:57:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d804271266c885e032d8ebae575fff5 SHA-1: 05e61321b853db1fea7a6518c8662a561588d983 SHA-256: edc479c6415389dd4d5f29f10afb66506b40e224f18c537af5613c6a699191c2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious sites. The document body, though heavily obfuscated, appears to contain text related to 'Dante inferno canto 34 questions and answers', likely a lure to entice clicks on the malicious link. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=dante+inferno+canto+34+questions+and+answers
    • http://files.nancyjcompton.com/uploads/1/3/2/6/132695478/gisumaxefejufupine.pdf
    • http://files.spotlightseniorserviceslasvegas.com/uploads/1/3/1/4/131454143/sewunubaza_wetobijakil.pdf
    • http://files.safetechconstruction.com/uploads/1/3/1/3/131383398/lewosojotujuru_teneweferasefow_rujufaxuju_foxotukiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4615/files/50872521824.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/lebosap.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/82262297354.pdf
    • https://cdn.shopify.com/s/files/1/0436/6431/0425/files/vinolufagijemawunan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2707/8042/files/puvitenekinigolosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/47556643347.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/merakepapoxojum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/wapomegiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/54072146897.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e2c.bin
0e04f69d55e5ce9ed0dc4a02d97bb26670264e8c2421184ef0ca99808343d7a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2C 5332 bytes
font_01_sfnt_off0000906d.bin
010288e26e133cff2d920de04d72a5f29c090fb37bce8d395c4d2e5be45eb0f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x906D 10408 bytes