Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97e5330887a6dfc…

MALICIOUS

PDF

42.0 KB Created: 2020-08-09 04:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a116c79b63aba4ec84411d29a63c51f0 SHA-1: 0ed89c1e529581398f7c9326adf5290a50ab22ce SHA-256: e97e5330887a6dfc9edf823c4bcee3824a375f6eaa4b3046a2e3d136f50d91cf
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=simile+worksheets+grade+3+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same suspicious URL. The primary attack pattern involves luring users to click on the malicious link, likely to download further malware or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=simile+worksheets+grade+3+pdf
    • http://files.ymirsrest.com/uploads/1/3/1/6/131606262/wogejesuf_muxikixiwol_nobunukula_wotiwinixero.pdf
    • http://files.donedberg.com/uploads/1/3/2/6/132682966/vixigeta.pdf
    • http://files.6thformcollege.com/uploads/1/3/0/7/130740504/nizeviki.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/kakasaderevebinenolap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/gokaxesugebefov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/gupid.pdf
    • https://cdn.shopify.com/s/files/1/0431/0905/6666/files/35773449735.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/cav_injection_pump.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/30310230372.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/vilena.pdf
    • https://cdn.shopify.com/s/files/1/0433/3397/6223/files/fagufuratome.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7949/files/62521030445.pdf
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/sudo_spctl-_master-_disable.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/rofojuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/36979481216.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/6701347266.pdf
    • https://cdn.shopify.com/s/files/1/0435/1898/4352/files/56452551933.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_off000064bf.bin
abaa0259a16b0ba55a0054be2f510b068e8979f6d61a1e622ce4baa13a63a9a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 5876 bytes
font_01_sfnt_off000078a5.bin
e5c7f26eefdab5cf5b7ef00b27d783d27e9b9c8eaecfd689a8e06540c666d5cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A5 10076 bytes