Malicious PDF — malware analysis report

Static analysis result for SHA-256 98178a15ab8654b8…

MALICIOUS

PDF

37.2 KB Created: 2020-08-09 18:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cfd3578d67806fd0cacfd9d68ae3405 SHA-1: 797ee23a81bbd2dad05bd68f0a5e1210161698a4 SHA-256: 98178a15ab8654b82748f731b3fef799c64ad1dc7b842b3a9b709074ca82fc59
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, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'French classroom objects worksheet pdf' and a URL that appears to be the primary lure. This suggests a social engineering attack aiming to redirect the user to malicious content. The primary IOC is the redirector URL: https://ttraff.cc/pify?keyword=french+classroom+objects+worksheet+pdf.

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.cc/pify?keyword=french+classroom+objects+worksheet+pdf
    • http://files.clwindowwashing.com/uploads/1/3/0/8/130873717/gevorisutile-wamip-puduzoj.pdf
    • http://files.wellsmusicpublishers.com/uploads/1/3/0/8/130874067/7865840.pdf
    • http://donuro.maliagillette.com/uploads/1/3/2/7/132740214/228696.pdf
    • http://files.vicbutton.com/uploads/1/3/1/4/131438216/xasukaniw-vamizafove-gebarezinif-jubeka.pdf
    • http://files.halloweencity.ca/uploads/1/3/1/0/131070212/3bd1ff912044e4.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/53330500898.pdf
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/abraham_j._twerski_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/89581452074.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3414/files/62663704575.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/39542739296.pdf
    • https://cdn.shopify.com/s/files/1/0436/7430/4662/files/english_speaking_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2043/files/17248813001.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/mozizawelasaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/8571060881.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/puwujirefofazugitexu.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_off0000459d.bin
891d056e703f571dd4861fe09bae23026fc608d819b66bf933a868a87f47b218
pdf-font-stream PDF embedded font (sfnt) at offset 0x459D 5460 bytes
font_01_sfnt_off0000580c.bin
1892f0436269f97b61c6ed1bbf69c36c7df31e4c0056c20d8c1a26b82df42749
pdf-font-stream PDF embedded font (sfnt) at offset 0x580C 9856 bytes
font_02_sfnt_off000079c5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C5 4324 bytes