Malicious PDF — malware analysis report

Static analysis result for SHA-256 224229e2c781bd56…

MALICIOUS

PDF

42.8 KB Created: 2020-08-07 08:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 791d6478c3a00fe3ea8b13200a08a7dd SHA-1: bdfee12b36e79588993d08935037c2c73ccbe450 SHA-256: 224229e2c781bd56cd708cb2f63d258858198d2efc5e2a96dd5a4d3f5fcd083a
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document body text and heuristics suggest a lure related to downloading free ebooks, but the primary link redirects to malicious infrastructure. The file also contains a PDF link farm, indicating an attempt to distribute or obscure malicious links. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=website+to+download+free+ebooks+pdf
    • http://files.elicranor.com/uploads/1/3/1/3/131398507/makegexel.pdf
    • http://files.jeanetteschevers.com/uploads/1/3/1/1/131164531/cd97871.pdf
    • http://files.lostrivercareercooperative.com/uploads/1/3/1/4/131452944/savafijajabesov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/42474574413.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/bobazaleparotosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/deutz_f3l1011f_parts_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/47547670675.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/xoluwifopuriravizijajukob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96704933611.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/kaxumegirenimawipivub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/tijopebizijijiwefekusafik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/tavupusolulebaxofiwal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/49124943647.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_off000069c6.bin
d96ad9355ac9f45bc442b6c1aa04cfef9f0c6c8ed9bf410c96b5d410908563b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 5344 bytes
font_01_sfnt_off00007c17.bin
06d92c3b3367fe6015a378af51bc065bde746e125b7abc7fad4a4740f566890b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 10096 bytes

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