Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88ebb1b338f6c7b…

MALICIOUS

PDF

42.5 KB Created: 2020-08-06 01:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a000f96c8edf3ff60d8d513693c5f5 SHA-1: 660a2a51869d392bed0833989817d0b1a0f41606 SHA-256: b88ebb1b338f6c7bd29d2914da25f8c3383fbe7e75df7085df64d558e57b4dfc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests a link farm or SEO poisoning technique used to distribute malicious content. The document body, though heavily obfuscated, contains the URL that triggers the redirect, indicating the primary intent is to lead the user to a malicious site under the guise of providing a textbook.

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=vce+further+maths+textbook+pdf
    • http://files.beholdvisiodivina.com/uploads/1/3/1/8/131871814/ridavugemega.pdf
    • http://files.raphastar.com/uploads/1/3/0/7/130776168/7836318.pdf
    • http://files.theallstarsgroup.com/uploads/1/3/0/7/130776037/puxabebotuz.pdf
    • http://files.coachellavalleyprenatalclass.com/uploads/1/3/1/3/131398097/gosodolajev_fimesadepirasax.pdf
    • http://files.wischandjackson.com/uploads/1/3/0/7/130776589/fazafoligasofur.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/86489213851.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7430/files/ayatul_kursi_shia_full.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/75356255828.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/47831741442.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7894/files/bwv_998_fugue.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/robibebogaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/23404741592.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/minerals_identification_lab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/59553923871.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/9932986118.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9621/files/pogasegopap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b50.bin
fada8ccdf606b367ad6e5ed5d1f53300a1410da906a49dac8c0b6b44dd8904d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B50 5328 bytes
font_01_sfnt_off00006d60.bin
288c6f021b8cc7c076a55bf1fd43302e8240d678487f18404d11acf32e32cf8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D60 9896 bytes
font_02_sfnt_off00008f3a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3A 4324 bytes