Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20db790a99b5163…

MALICIOUS

PDF

43.0 KB Created: 2020-07-10 04:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 809bd47c03c2e80548c1ca4778210600 SHA-1: a5eb3ace810120409d6058e2961995f1a6c91e00 SHA-256: e20db790a99b5163951fd83c1393d0fe8781f90a2530d79cc621bf28370ca063
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files, indicating a link farm. One of the primary links directs to a known malicious redirector. The document masquerades as an educational worksheet to entice users to click the malicious links.

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/wb?keyword=exponential%20function%20properties%20worksheet
    • http://files.supplydeskhavering.com/uploads/1/3/1/4/131453249/gudunarutosaxipob.pdf
    • http://files.sarahelizabethpowell.com/uploads/1/3/1/6/131636914/b147f4.pdf
    • http://files.forcesix.com/uploads/1/3/2/6/132683484/judizegexemarur.pdf
    • http://files.laurencuddy.com/uploads/1/3/1/4/131407057/dutajuvejame.pdf
    • http://files.bulldogconstructiondfw.com/uploads/1/3/0/7/130775018/kolijonubifo.pdf
    • http://files.chilternyouthfootballleague.co.uk/uploads/1/3/0/9/130969809/samafag_bumojugasizirap_robif.pdf
    • http://files.toblergymnastics.com/uploads/1/3/0/7/130776575/vodawor.pdf
    • http://files.ikargb.co.uk/uploads/1/3/1/4/131409170/c416f2d8c877.pdf
    • http://files.grimoirtua.com/uploads/1/3/0/7/130775134/wujutasasizezo.pdf
    • http://files.benjhomes.com/uploads/1/3/1/4/131438570/2073772.pdf
    • http://files.7akawati.com/uploads/1/3/0/8/130874451/piwafebulugurelafab.pdf
    • https://biwapatevav.files.wordpress.com/2020/06/80437754164.pdf
    • https://rirewiza.files.wordpress.com/2020/06/34100807409.pdf
    • https://gozuwexoje.files.wordpress.com/2020/06/20413452850.pdf
    • https://lililizita.files.wordpress.com/2020/06/17808113253.pdf
    • https://datipat.files.wordpress.com/2020/07/purizesemidubodizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4274895189.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.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_off00005f7c.bin
8181c17332826d4b3e2c710cc048004464ddb146218777600624a86bd209f106
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 5168 bytes
font_01_sfnt_off0000711c.bin
d7bded676dedbef98ca78025bbc1eda3273492b2f86b6d40c28cd83761ecc247
pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 14516 bytes