Malicious PDF — malware analysis report

Static analysis result for SHA-256 d325717cdb649200…

MALICIOUS

PDF

44.5 KB Created: 2020-08-04 04:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16662eca224878820444100784fede84 SHA-1: 299fa2ce8162102ce9297611eb8495a651486f5d SHA-256: d325717cdb6492005224cfaf03a6773bb0a0ae62966b798e24a81b02daee7c85
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains text related to personality tests and the malicious URL, suggesting a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate malicious intent. The ML classifier also flagged this PDF with high confidence.

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.cc/pify?keyword=myers+briggs+personality+type+test+pdf
    • http://files.goepfertspeechassociates.com/uploads/1/3/0/9/130969048/jamufopinopi.pdf
    • http://files.capsulate.life/uploads/1/3/1/6/131637043/3dbc87c275738.pdf
    • http://files.flexgridapp.net/uploads/1/3/1/4/131483154/9317280.pdf
    • http://files.shamanicpathandpractice.com/uploads/1/3/2/6/132695782/juxuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/3336/9503/files/29597192554.pdf
    • https://cdn.shopify.com/s/files/1/0437/5127/6696/files/5019708222.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/22069744413.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/36330168616.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/58787010031.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/nowatikaravowunumil.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/rifoxoguxemokubenisavapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/49617539368.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/gobanuseti.pdf
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/bidokibevoxibasibulitogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/tosesejujugadesarudalopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/82729959246.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_off00006e20.bin
99e44272a1b392371b178fd40f01cb904070eefbc287e16b146471deadc4255d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E20 5456 bytes
font_01_sfnt_off000080cd.bin
a0425230a1e9dfd654e89383733c1a1de73152bc55f0e4e5a69bbe88498f5145
pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 10552 bytes