Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dccac1936744f37…

MALICIOUS

PDF

45.4 KB Created: 2020-07-18 21:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cb507583b0145af9dd59e79fca9b6b8 SHA-1: 162bafee131b5b93fc44a2e815f547f93e340bd9 SHA-256: 4dccac1936744f37e22ba985b422ead9e005f55bfe7868c5b54f55f95af9611a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, designed to redirect users to external websites. One of the primary links directs to a known malicious redirector, ttraff.com, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be related to a worksheet, likely a lure to disguise the malicious intent.

Heuristics 3

  • 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.
  • 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/wb?keyword=gymnosperm%20and%20angiosperm%20worksheet
    • http://files.seanhuttonmusic.com/uploads/1/3/2/6/132682655/3cda6b7f4f1a1a1.pdf
    • http://files.teachingandlearningwell.com/uploads/1/3/1/1/131164351/lekajabufuj.pdf
    • http://files.sinisterkiss.com/uploads/1/3/0/9/130969435/zavafiviredatek.pdf
    • http://files.dianeperell.com/uploads/1/3/0/7/130738596/7381900.pdf
    • http://files.krasnoevents.com/uploads/1/3/0/7/130740252/9037144.pdf
    • http://files.alexanderassociatesllc.com/uploads/1/3/1/4/131483685/bb51e77dd0c781a.pdf
    • http://files.baguiosoundsrental.com/uploads/1/3/0/7/130775856/jubafipasubaza-matizonenir.pdf
    • https://ruzugebemem.files.wo
    • https://ruzugebemem.files.wordpress.com/2020/07/26393575223.pdf
    • https://budizuboj724492172.files.wordpress.com/2020/07/xokubefuloximu.pdf
    • https://vosafeviba.files.wordpress.com/2020/07/vejopijomapagavo.pdf
    • https://nirakopifaz.files.wordpress.com/2020/06/80424724512.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/monarukovixutoxiwanagad.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/41317888733.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/kazuvodakitolo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/58903053293.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/78515897403.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/55430331746.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9667/files/58890032608.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_off0000737b.bin
74407872bc710e11ecb0c89fdfa222d8667497cf2ff8ac4d7f0c2e6fecdca76f
pdf-font-stream PDF embedded font (sfnt) at offset 0x737B 5416 bytes
font_01_sfnt_off000085d4.bin
bb3c918de17ae2dd0fed5901e8cb5217bfbe61ea954b966d4820f7df0d9488b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D4 10140 bytes