Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b8787833ab53a6…

MALICIOUS

PDF

38.9 KB Created: 2020-07-19 10:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 571b3dbdd2856c910abee5a8efba5958 SHA-1: 1450fa521c97189fdd18b12c8b3e7561ce3fcafc SHA-256: 46b8787833ab53a6010e2d720fd4090928a081ba1d6a9ddab5c03395788d91bd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to `https://ttraff.cc/wb?keyword=past%20simple%20passive%20worksheet%20with%20answers`. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on WordPress. The document body, though heavily obfuscated, appears to contain text related to a worksheet, suggesting a lure. The primary attack pattern involves tricking the user into clicking the malicious link.

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=past%20simple%20passive%20worksheet%20with%20answers
    • http://files.borobengals.com/uploads/1/3/1/0/131070173/dazozasejugufe-bupolinur.pdf
    • http://files.davidensleydesign.com/uploads/1/3/1/0/131069766/9174616.pdf
    • http://files.soleilalamoana.com/uploads/1/3/2/7/132741144/runijinanuviza-lenuteza-nimogolinatoxu-povasupinidud.pdf
    • https://dofotim.files.wordpres
    • https://mutemoxapeko.files.wordpress.com/2020/06/20468480495.pdf
    • https://pejeriniva.files.wordpress.com/2020/07/89555191856.pdf
    • https://volisavosak.files.wordpress.com/2020/07/71878100898.pdf
    • https://gajodutejek.files.wordpress.com/2020/06/bisobetavobamege.pdf
    • https://dofotim.files.wordpress.com/2020/06/guxolivosixexuletin.pdf
    • https://vowivol.files.wordpress.com/2020/07/xonatimesimuz.pdf
    • https://jorelada.files.wordpress.com/2020/06/lekopajupometexiz.pdf
    • https://relotudop.files.wordpress.com/2020/07/munegajel.pdf
    • https://weteritisomu.files.wordpress.com/2020/06/68949733017.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/37976766623.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9376/files/90553974944.pdf
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/wurawijamufiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/53379429357.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/gazamujumixuraxigopeputu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/92265200213.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_off00005bde.bin
07578b817576d8289b78559e7bd8eadc16c3266c967df294edc5dfa3beaa1689
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDE 5064 bytes
font_01_sfnt_off00006cf0.bin
f447d3ca7339f99a97b9e973a5fd26435a866ebfc2204e2ebab5d665550d1445
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF0 9720 bytes