Malicious PDF — malware analysis report

Static analysis result for SHA-256 551edea894b04a1e…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 21:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d7389ddf340936fa0685db2c5fb8028 SHA-1: 4bcd0d86efc5caa8d20ab46ab3e5e65616a61762 SHA-256: 551edea894b04a1e3262029bd91ca4b1dfcc006dfc7dceb0f1eec9a66937331e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=edit+pdf+text+box+font'. The document body, though heavily obfuscated, also contains this URL and a large number of other URLs hosted on Shopify, likely part of a link farm. The primary intent appears to be directing users to the malicious redirector.

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.ru/pify?keyword=edit+pdf+text+box+font
    • http://files.3dbikefit.com/uploads/1/3/0/7/130740625/maxiwudimaned_xunumakorip_zenunigak.pdf
    • http://files.lotusdirect.co.uk/uploads/1/3/1/3/131398222/6944350.pdf
    • http://files.kilkennyfootclinic.com/uploads/1/3/1/8/131872037/3214212.pdf
    • http://files.erinpatrickmiller.com/uploads/1/3/0/8/130874115/1730f8802.pdf
    • http://files.singershowroom.net/uploads/1/3/0/7/130738559/degonetesafu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/zasedozopodimoz.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2254/files/rimworld_mod_load_order_tool.pdf
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/94581271015.pdf
    • https://cdn.shopify.com/s/files/1/0431/3822/0181/files/babysitting_cream_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/5716/8027/files/72457109333.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3288/files/doluramu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/52508485486.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/fudasi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/64241812562.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/dapamozemoxutafiwafela.pdf
    • https://cdn.shopify.com/s/files/1/0435/4536/2591/files/zuzazorijanilewibilu.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_off00006406.bin
5ac7ef61aab06e8aa0577ae831c3dad6a6d0b19f7982a1dc04a84d42214c0caa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 4472 bytes
font_01_sfnt_off00007349.bin
c84185e952f3ddfa513d4b3aff0893390099015704bc3297c1e3b7123677c7e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7349 9820 bytes
font_02_sfnt_off000094d0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x94D0 4324 bytes