Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f35e2f42738ec34…

MALICIOUS

PDF

35.7 KB Created: 2020-08-07 19:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4242adf6f5f92c8f87e03929b8fc6332 SHA-1: 722dd707e461ff0cc014d98ee98a9da69a4934d9 SHA-256: 9f35e2f42738ec3464083023febecf302101ce5d1893c84f4436d2f14b4417c7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=cambridge+primary+science+curriculum+pdf'. This suggests the document is designed to redirect users to malicious sites under the guise of providing a curriculum PDF. No scripts were extracted from this sample.

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=cambridge+primary+science+curriculum+pdf
    • http://files.stmarymagdalenewpg.org/uploads/1/3/1/8/131856531/badifa.pdf
    • http://files.msimone.com/uploads/1/3/1/0/131070212/3565284.pdf
    • http://files.dogsworldwalking.com/uploads/1/3/2/7/132712266/gexukejenomunokuzo.pdf
    • http://files.achievemediation.com/uploads/1/3/2/3/132302941/lifad_romoga_xalozaz.pdf
    • http://files.thelocalsignman.com/uploads/1/3/0/7/130776895/44485.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/12036923697.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/riworuga.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/login_to_my_adp.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/77795408943.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/amigo_brothers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/80092681316.pdf
    • https://cdn.shopify.com/s/files/1/0437/7195/3301/files/puwugiveze.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/mystery_skulls_forever.pdf
    • https://cdn.shopify.com/s/files/1/0438/7035/5611/files/colloquial_english_gareth_king.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/pilavesogomovu.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_off00004bf4.bin
808568bf0fbe9a23decdac7cf0f7e8683b621176b81ca9d0a5a6b94496e16c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF4 5620 bytes
font_01_sfnt_off00005efc.bin
f922e4355809a622de35df5a1c940f76b6cbcb983b3a9021dc30f7aa49d2b503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFC 10480 bytes

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